 Good evening guys, good evening, good evening, good evening, good evening, good evening, hope I am audible, the screen is visible, very good, very good, very good, very good, Susandhya are in, the document was shared, 22 questions are in here, the questions are so simple that you won't be needing any explanation, anyway you can keep your books open or the PDF open which I had shared with you, okay, zero numericals namish, I mean zero numericals doesn't just don't, like you don't have to apply some big formula thingy and all that, some chintu type numericals might be there, okay, big subject, thanks a lot Aditya, welcome, good morning after the ages, no Shridharacharya Shreya, Shridharacharya will come when we will be discussing about the magnitude of electrical energy in electromagnetic induction, okay, only in one type of question but that won't come for you guys, for 10th grade, in science there isn't any Shridharacharya, I cannot understand people who hate Shridharacharya, just look at the beauty of the scenario, right, Shridharacharya is such a simple thing you don't have to put your brain in thinking about the factors and all that, okay, so there's 51 people in, it's 803 now and I am starting the quiz, look at the first question, is maximum 4, is maximum 4, is maximum 4, these capital A's means angstrom, okay, don't be like, yeh kya hai, ananya please, so yes most of you have answered it, right, it's somewhere around, thank you very much, it's somewhere around yellow light, very good, angstrom is one of the units of wavelength, it's 10 to the power minus 10 meter, angstrom is also used to measure atomic distances, you might have mentioned like being through this word in chemistry, 9th grade structure of atom, you want to see the question Ananya, here's the question, okay guys, good, here we go to the lead board, yeah, I had given the book yaar, myself shared the PDF, Vibhav is the top, Arya Rao, Sneha, Satyam, Sharon, Bender, Siddharth, Daksh, Tweeto and Aryan, good, I am going to the next question, anyone want to change their name, Arya for ready, okay, so there is no N-R, very good, here we go to the second question, near and far points of a human eye are, near and far points of a human eye are, straight mentioned in the book, you can open, you will find that the answer is smiling at your face, neither the options are confusing, very good Mungara, good, good, good, congratulations, please help me out also, like if you have done some settings and all, please, please, please, please, please, please, okay, no problem with the line too much time because as soon as everyone will respond, it will by default close, so we will anyway save the time, 56 people have answered not yet everyone, 58 people responded to this and 38 people got it right, please, please, please, tends to infinity, okay, so the far point is toward infinity, yeah, leaderboard, you want to see the question Ananya, just, just, okay, good, here we go to the leaderboard, Arya, Sneha, Siddharth, Daksha will be, Daksha was the fastest one to respond and now Sneha is leading the scenario, was first question given in textbook, was first question given in textbook, just check, there is a block, I will show you after that, okay, next, Myopia is the defect of vision due to which a person finds difficulty in seeing, in seeing, in seeing, Aryan yellow is mentioned over there, okay, and color bandwidth near rainbows, like that prison wall act, it is present, so collating the two data you can answer this, the first one I am talking about, okay, yes, I myself did altered the option, okay, in the book it is somewhere around 5000 written, whereas I stated as just utilizing the, as someone was asking for the code, third question, everyone has voted, very good, we saved time and yes, 42 people are correct, good, good, good, good, good, the question was Myopia is the defect of vision, right or not, due to which a person finds difficulty in seeing, clear, clear, clear, there is a parallel name over there if I will say that might become the hint for the next upcoming question, so I will not interfere over there and proceed to the lead board, so Sneha, Daksha, Aryan, Siddharth, Aditi, Sivriti, Sai, Karan, Khushi and Laina, Sneha is still leading the scenario, Daksha was consecutively the second time, the fastest spot there, there we go to the next question, astigmatism can be corrected by, yes the primary way of correcting astigmatism is surgery, laser surgery, but there is one more method, relax, read and respond, you can select it by rejection, the scene with this question is you can select it by rejection, okay, 58 people responded, 3, 2 and 159, good, good, good, 19, 19, 13, 8, cylindrical lens, cylindrical lens technically corrected is the wrong word, couldn't get the scene, no problem, here was the question, astigmatism, astigmatism is the defect in which you can, okay, about the glitch at your end, no problem, back to the scene, astigmatism is a defect where you or the one being ineffective will not be able to differentiate between horizontal and vertical lens that can be corrected by using cylindrical lenses, NTSCs, 2 years back it was there and consecutively it had been there in repeated number of times, okay, so astigmatism and press biopia are two things, NTSC is very, very mad about, okay, like that, corrected or fixes, that's a good, good, good, good selection of words, but you are talking to the wrong person about it because my English is very Tuta Puta one, Khushi was the fastest one to respond, leave a word, some word remain the same and here we go to the next question, the ratio of the refractive index of red light to the blue light in air is near the prism you will get that answer, just telling you, the ratio of the refractive index of red light to the blue light in air is, now you guys might get confused between two options only, I know, okay, that's what to be seen, let's see, let's see, let's see, let's see, the bar should be there in two options only or at one also, that's also possible, yes exactly 28 and 19 people please don't remain confused, if you look at the diagram of the prismka refraction, if you look at the diagram of the prismka refraction, you will find that the order followed is from downward right or not, it's not from upward Vibhgur, it's from downward Vibhgur, it mean what, it mean what, it mean oops, no, it mean what, when radiation goes and it comes out, violet is the most refracted and red is the least, clear, and by that red with respect to blue, okay, clear, red with respect to blue will be less than one, clear, whereas the other blue with respect to red would have been greater than one, GI got it, please remember this is also one of the favorite questions, good, and now reaching to the scenario where Neera board, oh, Daksha my dear friend missed it, R and my dear friend missed it, good, good, good, Akshit was the fastest one to respond, very good, very good, very good, here we go to the next question, a normal eye is not able to see objects closer than 25, I should have mentioned the unit, but just the options are revealing you that, okay, 25 centimeter because while uploading these tests, I was like, yeah, this centimeter should have been written and all that, now the focal length of the eye is 25, that's it, no, then what is called power of accommodation by if the focal length of the eye is 50, okay, no problem, no problem, no problem, 17 and 30, guys please see, a normal eye, a normal eye, a normal eye, a normal eye is not able to, right or not, because the focal length of the eye is 25 centimeter, no, the distance of the retina, no, retina is like, it is all about the power of accommodation, the eye is not able to decrease the distance between the eye lens and the retina, no, the eye is not able to decrease the focal length beyond this limit, GI, got it, we are adjusting the focal length of our lens, which is also called in technical words, power of accommodation, better because it is not fixed, you can't say that the focal length of eye is 25, no, got it shares, good, good, good, so look at the leaderboard, good Dax very precise utility of words and Dax now getting 934, good, good, good, good, good, good, good, good, good, good, good, here we go to the next question, Sneha maintaining her position at the top, beautiful, myopia can be removed by using a lens of, after this lens using a lenses of very dirty English, sorry, by using lenses, by using fill in the blank lenses, by using fill in the blanks, concave lens, convex lens, cylindrical lens by surgical removal, better the word lenses is there, then only one option is there, good evening dear friend, you are late, no after removal there is a word, lenses is also there, exactly, okay, okay, okay, okay, 50 people got it right, good, good, good, good, good, no explanations required for this, E R for explanation required, N E R for no explanation required, Medha, what happened dear, myopia, myopia is corrected by concave lens, why, because, okay, okay, okay, no problem, no problem, anyway I have these here, because you have to widen that radiation which is coming up, question is not wrong, no I was just stating that English could have been corrected, that's it, I never said that the question is wrong, how to correct presbyopia might be an answer of some upcoming question, so not telling you that right now, okay, no problem, got it, got it, got your message, no problem, sir, yes, who's there on, Aniket sir, Aniket, MG, MM, yeah proceed, sir technically myopia cannot be, I understand that, that's what I am commenting on the English part of it, okay, but the option in the question, words sink as thank you, what to be selected, okay, so thank you very much, thank you very much, thank you very much, here we go to the leader board, Sneha Mizzet, Daksh, Aran, Aran was the fastest one actually, Daksh, Aran, Sneha, Naina and Khushi, here we go to the next question, Gupta is 58 by now, it's okay even late, that's it, no problem, 59 people answered, 8 seconds remaining, 60 people answered, not everyone yet and 36, 13, 8 and 3, good, at noon the sun appears white as light is least candle, good, good, good, good, good, here we go to the next question and before that the leader board, Satyam Sneha Naina, now Sneha might cover up the distance, oh, oh, oh, wow, homecoming, good, good, good, good, good, good, here we go to the next one, which of the following phenomena of light are involved in the formation of rainbow, gajap, reflection, refraction and dispersion, all three, refraction, dispersion and total internal reflection, refraction, dispersion and internal reflection and dispersion, scattering and total internal reflection, i like how meanty hived me up today and is like, okay, oh, oh, oh, oh, oh, oh, oh, oh, oh, oh, oh, oh, oh, oh, oh, oh, oh, oh, oh, oh, oh, oh, oh, oh, oh, oh, oh, oh yeah, yeah, let's go through it, so reflection, refraction can't happen together at least for the rainbow case, okay dispersion is surely one of the only one of the dominant one so dispersion should be there it is there in all the four options right then talking about as someone claims what is the difference between bravo and chari so refraction refraction dispersion dispersion and total internal reflection internal reflection ok ok ok ok ok why why why why very good very good why why why why why as this part is partial this is partial and rainbow is partially rainbow doesn't act like a mirror no it's not a total internal reflection but the rainbow is a natural thingy right it's partial rainbow doesn't like rainbow doesn't act as a mirror you got it if it will be total internal reflection rainbow will start acting as a mirror it is given in the nct it is total internal refraction not only internal refraction chalo i have kept that book beside me for that sake i never keep the book can you please help me out with the location my dear friend if that will be see it is totally based on ncrt so even if wrong thing is written over in ncrt for today i will have to give you a score page 192 193 194 haha rainbow is a natural spectrum appearing in the sky after a rain shower it is caused by dispersion of sunlight by tiny water droplet presenting in the atmosphere the rainbow is always formed in uh so so no ncrt can scam us into learning wrong stuff it is partial not total alright but the score is like open book right in the open book it is even said that there are 18 levels we'll have to at least give this score to those who are responding like a rainbow is always performed in direction the conger is the water droplet ladle uh the re they refract and disperse the incident and the reflection and you got the answer there is a word only written as internal reflection got it see that's why i kept this test 194 page number top from the top there is a beside the rainbow diagram the catch words are between the lines figure 18 11.7 and 11.8 okay everyone g i got it good good that's that's a healthy discussion that's a very healthy discussion good good good job good good good good good so moving on to the need about which we'll be having shuffles now Sneha see Sneha Nana Satyam Daksh Smithi are in Akshay how much will you jump my dear friend good Akshay very good very good very good Ganesh was the fastest one to respond and here we go to the next question of stars is due to atmospheric dispersion of light by water droplet refraction of light by different layers of varying refractive indices scattering of light by dust particle internal reflection of light by clouds again in very very straight line with the concepts i can't read the question so reading helps a lot thank you sir okay why why why why why is it like a sorry anike isn't it uh uploading yes like matrix matrices 25 people got it right and yes that's very absolutely correct okay because it happens because of atmospheric refraction here we go to the leader board Sneha missed it Nana Akshay Daksh okay Rn is the fastest one to respond for this one here we go to the next question the clear sky appears blue because blue light gets absorbed in the atmosphere ultraviolet radiations are absorbed in the atmosphere violet and blue lights get scattered more than lights of other colors by the atmosphere light of all other colors it's scattered more than the violet and blue color huh that's good shares it might be correct right the good share sorry but it's a combination like you hardly differentiate between v and b and uh here okay 44 people got it right for very obvious reasons i think no explanation required er only those who want an explanation please send er very good aditya what happened bitter you can unmute and talk aditya ganta also please you can unmute and talk bitter what happened okay then what is your like what is about aditya g at least you please so i'll just give a formal can you explain the phenomena okay but say no problem see the clear sky appears blue because the radiations which are being any emitted as our white balanced light okay we'll have all these seven friends right or not but yes you know these seven friends have different individual properties okay some have higher stamina like red they travel farther okay so some are more socially solvable like violet and blue they get scattered more okay and because of that scattering we see violet and blue mixed up like blue color okay in the clear sky what it g i got it eight thirty the don't say that yeah okay no problem no problem here we go to the leaderboard so naina akshay dax naina missed it rn snaya where snaya snaya is there at the fifth position shuffling fourth position now rn was the fastest one to respond here we go to the next question which of the following phenomena contributes that contribute significantly to the reddish appearance of the sun at sunrise or sunset there could have been like word and also use just now you are talking about the stamina of good friends right dispersion of light scattering of light total internal reflection of light the reflection of light from the earth what and again no i was stating here at eight thirty don't tell that this is an ncrtbh quiz you are half done through the quiz and then you are realizing it relax good so now okay 40 people got it right 40 people got it right achha now aniket aniket aniket aniket aniket my dear friend i had uploaded the pdf of this right please okay even i forgot the what was the question which of the following contribute significantly to the reddish appearance of the sun at sunrise or sunset okay clear so the dispersion of light the scattering of light is important okay the dispersion of light the whenever required we use the dispersion of light the scattering of light total internal reflection surely is not there in the scenario and reflection applied from the earth okay so now understand this the scene is bache why not dispersion someone ask right sir if there is no dispersion how do you get the colors dear daksh dispersion means when they travel from different mediums they will their velocity will be separated no this is not related with that the scene is the scene is the scene is the scene is the scene is that all of them are running together only red is capable of reaching you why because red keeps this energy concentrated in order to travel more distance whereas these have a spreading scenario they just spread out here okay red is the one which reaches out to the longest distance because of having higher wavelength but light is not getting splitted with a here see now understand this if this would have been dispersion understand this if this would have been dispersion if this would have been dispersion traveling a bit further you should be able to differentiate you should be able to differentiate between vipgir if you will travel thodasa extra if you'll travel thodasa extra what you will receive is a white balanced light got it if this would have been dispersion moving toward it you should have been able to see the different color bands gi got it got it got it got it good good good good good good good leaderboard 40 people answered it right kuchto bada paragraph is there white light is made up of these colors naturally they don't have to be split in microscopic view the colors are parallel to each other and perceive as white light good good good thank you rn for this enlightenment and aksha is still leading the scenario rn is the fastest one good rn very good very good very good where are where is our dear friend the girl who was having a consistent top position chalo just wait for us she'll come back here we go to the next question the bluish color of water is in deep sea is due to the presence of algae and other plant found in water reflection of sky in water scattering of light absorptions absorption of light by the sea again the same discussion what happens in sky happens in water can you explain the difference between scattering and dispersion okay magna no problem 30 23 one second guys one second one second one second oh no no different question yeah okay i i saw actually this question and i was like how come total internet reflection then i realized okay charlie is correct yeah but i'm not reflection of sky and water scattering of light what happens in sky happens in water again the same thing blue color has the highest capability to scatter blue color is the highest capability to scatter sir by a coincidence okay sir by a coincidence sir by a coincidence once again i was reading it so by most of the questions that i get correct are the ones in which you gave hints thank you but doesn't the sea reflect the sky okay exactly yeah yeah wait let me read it the color of sea is not because of the sky reflection no no see that might be one of the factors but dominantly the reason is the scattering of light please if options see option d said reflection of blue light by sea wouldn't that also be correct option option d absorptions of light by the sea absorption of blue light by the sea won't would have not been the answer because if blue light will get absorbed okay then you won't see blue right right how like the first question we have discussed how do we see colors is a different scenario in when we have to see a color that color should be reflected should not be absorbed in some places we see the color of the sea as green yeah greenish blue that's bluish green actually that color name is all you know sea green color and all that okay okay guys please understand as the light enters in this water body it will scatter what scatters the most is the blue color hence we see the bluishness in the sea water is like but plants don't grow near the shore hey what not nothing something else you scam sorry jaya let it be i have been scamming you guys from two years why not option b because reflection of sky in water no no because understand this i i'll tell you that also now suppose i'll tell you i'll give you the reason okay understand consider your sea level as a mirror understand this relax and consider your sea level as the mirror this sky is here why will you see the surface image won't you will see the image here of the sky the sky image the sky object why do you see it here as well got it a water is completely transparent is a difference okay so i guess that partially satisfies guys i am satisfied guys i am proceeding okay scattering is the answer please understand please understand please understand which ocean did you go to here we go to the leaderboard and next question also akshay aryan ganesh khushi sneha is there okay sneha good good good good good good when light rays enter the eye okay most of the refraction occurs at the when light rays enter the eye most of the refraction occurs at the options are crystalline lens outer surface of the cornea iris pupil firstly says like this click good good good and he gets seven six five four three two one okay okay okay okay okay 16 32 6 and 4 32 people at the outer surface of the cornea why because that is where the density of media start changing okay good good good good good good good good good very good guys very good you do board akshay sir shita ganesh aryan was the fastest one here we go sneha is i guess experiencing some network glitch or something here we go to the next question the focal length of the eye lens increases when eye muzzles okay now this is good our relaxed and lens become thinner contract and lens becomes thicker our relaxed and lens become thicker contract and lens become thinner i i i just forgot what were the options guys understand this is given good chk is a nice batch i can like tell in front of everyone chk is a beautiful batch chk literally take all my simple questions very seriously and 36 36 people when muscles are relaxed and lens become thinner thinner lens will have a higher focal length simple see the volume of the lens will remain same right okay if it has to be smaller it will widen up whereas it has to be larger it will just go okay thinner lens means higher focal length clear thicker lens will be lesser focal length g i got it in total there are 23 questions i guess we are running okay with the time and here we go to the leaderboard could i repeat aditya okay i'll come back so sai was the fastest one good aditya what i said is he by the volume of the lens will is constant yes or no the matter of the lens right no problem yeah so now see where it is thicker it means it will have to decrease its lens whereas when it is thinner it will increase yes or no okay now this is a higher focal length this is a smaller focal length got it good very very good very good very good very good next question 22 questions are there yes which of the following statement is correct a person with myopia can see distant objects clearly good a person with hypermetropia can see nearby objects clearly excellent a person with myopia can see nearby objects clearly good a person with hypermetropia cannot see distant objects clearly wow should be completed before time as a va is va is exactly the wrong allegations but that isn't in english as well her priority is not to hindi but to english yeah so yes 44 people got it right absolutely correct it was given in our viewer questions as well okay yeah a myopic person will be able to see nearby things will not be able to say further things which is the reverse case for a hypermetropic person moving on to the leaderboard akshay misdead sai misdead are and good fastest one as well and leading the scenario daksh is also there daksh was in top five okay for a long while and he's been continuing very good very good very good going on to the next question yeah like sorry which of the following letters do not surface do yeah exactly misclicked action also lateral inversion lateral inversion lateral inversion only one option is there which looks beautiful both i was on the same position for seven questions oh very good aditya so now what are you expecting by people misclicking on the option on the right option 36 people got it right yes and i don't think so any explanation is required but there is no okay horizontally open face okay there is one horizontal open face there is one horizontal open face there is one horizontal open face g i got it this is also a utility for you in m t s e come mat part g mat okay so daksh was the fastest one to respond with 9 4 6 good good good good good good but still for 76 and 5 34 a good difference between r n and daksh let's look at the next question loss of ability of eye to focus on a near and far objects with advancing age is called you know the answer also you can go through by selection by rejection also someone asked me about the corrective measure of this thing and surface was just a type of our face right yes exactly bishop sorry there are many like i have noticed somewhere around seven i somewhere around seven spelling mistakes five hints for this okay so uh times up 39 press bio pi is correct it is corrected by should i tell you guys it is corrected by when there is a issue which is both concave and convex then it should go with by focal lengths good good good good good good good good next question and before that the leaderboard khushi missed it r n daksh r n was the fastest one very good very good very good very good very good sneha elevating up good here we go to the next one yes that's something yes please yeah like our physics book book okay the laxmiasing and manju the car the supplementary book in that it says that press biopia can be corrected by using a convex lens it how come press biopia page number 278 again the same thing right we we can have a discussion on this but suppose it is also there keep by okay that is only correct and what i am saying is wrong okay but right now what we are referring for this open book is right is our beautiful book n c e r t for which the period was shape okay but understand that we can correct it correct it over there by your pencil press biopia if would have been corrected only by that one single lens why will we would have called press biopia press biopia we could have continued calling it hypermatropia only right okay sir yes good good good good good good good good here we go to the next one see page 278 of laxmiasing right because 278 won't be reaching in ncrt they're 280 right proceeding to the next question a person cannot see distinctly a person cannot see distinct objects kept beyond a two meter this defect can be corrected by using a lens of power positive power or negative power symbol i told you minor numericals exist okay guys explanation required e r good good good good good good good how many people got it right 26 now first of all first first thing first positive or negative how will you decide positive or negative how will you decide positive or negative how will you decide that part only that part positive or negative how will you decide very good very good very good very good very good lens use and now lens used how will you decide by the defect clear fine beyond the two meter means still two meter he can see see. So nearby objects are visible, farther not visible means this is what this is myopia yes or no? Myopia will deliver you will require right or not you will require will require will require will require the correction of correction of correction of concavalence hence power will be negative focal length will be negative yes or no yes or no yes or no yes but now the problem is there is a bravo and there is a delta as well okay which one easy easy easy easy which ever is here okay clear whichever is here got it got it got it got it got it got it got it got it got it two meter cut distance two meter cut distance is not visible two meter cut distance is not visible this is easier for people with glasses no how come a slasher how come like why are you commenting that if you can unmute okay like I use this statement in the class suppose next time you are relative ask you yo bacha at this age you have the specs right you know then what should you like what's your power huh with fake worry they ask yeah exactly so what will you ask them uncle diopter mein batana hai ya meter inverse should I tell you in diopters or in meter inverse right the situation will change now talking about the question talking about the question talking about the question talking about the question so now beyond two meter not visible near point near point near point near point near point near point near point near point near point is 25 clear fine clear sure anytime sure anytime no comments bro thank for the compliment guys I'll take it okay okay okay okay so one upon that's what I was saying one upon two clear is where the focus should be concentrated and beyond it okay clear so the power will be 0.5 meter this focal length is off this focal length is off yeah exactly minus feature because of concave so it will be negative power gi got it if this would have been five meter then this would have been the answer gi got it good good good good good good good good good come quickly let's finish it up here I was targeting a timely finish and exactly I had kept 20 questions now I am cursing myself why did I like included two more rn is the fastest one duck she's also there and there we go to the next question sitting on the last bench can read the letters written on the blackboard but is not able to read the letter written in the textbook which of the following statement is correct the near point of the his eyes has receded away the near point of his high eyes has come closer to him the far point of his eyes has come closer to him the far point of his eyes has receded away so the correction is the answer right the correction is the answer good good guys very good very good no explanation required right good what type of correction the collective measure you are taking was the answer because that is selected why we select convex lens or we select concave there was the fastest one to respond rn is still leading the scenario and here we go to the next question which of the following statement is or are correct regarding the propagation of light of different colors of white light in here okay red light move fastest blue light moves faster than green light all the colors of white light move with the same speed you have to point out the correct or wrong correct yellow light moves with the mean speed as that of the red and violet light such a beautiful option option number d exactly eight seconds good daksh and times are 25 that's confusing but 14 people only why no red five light move farthest not fastest farthest no ananya the speed is same there dispersion happens because while traveling through another media their speeds vary okay but in same media their speeds are same in air the speeds are same all the colors of white light move with the same speed their wavelengths are different okay no problem no problem no problem no problem no problem so for like 25 people are too many ganesh now this will see a good shuffle no good shuffle rn is leading the scenarios with a huge bandwidth very good very good very good now this is the last question okay whatever shuffle you guys are expecting can and here we go if not for this question i would have thought of uh was correct okay no no there are people who are considering that no no we can't consider this getting over you consider human iron colorful world as completed yes no yes no i was thinking while looking at this statistical information i was like yeah with this statistical information i'll decide whether to go over human iron colorful world or not mehna i'll come back i explain but i'll come back don't worry okay we didn't better rn if just to remind you better we started the chapter of the unit light with these words no problem no problem we'll cover it rn a abct trick interesting informative productive epic good and i was like no problem no problem good good good good good good good good good good so last question the danger signal installed at the top of tall buildings are red in color these can be easily seen from a distance because among all other color the red light is scattered the most wow is scattered the least wow is absorbed the most by smoke or fog or moves fastest in years so again if there would not be the prior question many people might have gone for option number daily top but now at least that is neutralized good guys good good good times up 51 34 people good good good good good good again the same scene is scattered the least if it would be blue it will be scattering the most okay so fine and speed is no challenge clear thank you very much for your time and here we see the final leader board rn gyanesh akshay dash hoshi and rn is going to win there good rn was the fastest one as well very good very good very good very good very good good show good show rn everyone good good good good very very good guys good night take care bye