Physics 11.1.2a - Image Formation

[IITji]

The objects formed by the plane mirror are virtual, right ?

Virtual images cannot be obtained on screens. So, why do we see the images,? Or in other words , images are formed on our retina , which is also a screen !!

[kvlo1986]

Part 2, for instance, in the reflection of the cube, on a a varnished wood floor, you would see the reflection of the cube being crisper nearest to the actual cube, near its base, and as the top of the cube is reflected, or as the reflection stretches downwards, the image gets muffled and diffused why? Its the same surface, and even as I put my face to the floor almost, the image gets even more clear overall. Its Fresnel's law, but what causes the diversity in reflectivity depending on the angl

[kvlo1986]

Derek, grab a dirty mirror or somewhat specularly reflective surface, which surface is constant all around, no changes. What causes or how can you explain Fresnel's law in simple terms? We do not see this effect in mirrors, but we see it in shiny spheres or floors. What does the angle of my eye relative to the reflecting surface and object being reflected, have anything to do with the image being clearer in one area, and more diffused elsewhere?Why does light reflect better in parallel angles?

[13game3]

lol That looked like cyclops. Great video though.

[13game3]

lol. That looked like cyclops.

Great video. Very professional.

[alexclio19]

wow. i love this. i'm going to report this lesson in our physics class. very helpful sir! thank you! :)

[TheDevilvivek]

in concave, plane and convex mirror the ray of light do not pass through the mirror it refletc then how image is formed in the mirror.

[TheDevilvivek]

if the rays of the object after after reflection interset then the image will be produced in the surrounding not behind the mirror yes or no

[TheDevilvivek]

when i put my head beyond c (concave mirror) i saw inverted and diminished image behind the mirror but in concave mirror when the object is placed beyond c image is formed between centre of curvature and focus,please help me out

[TheDevilvivek]

frequency in sound is directly or inversely proportional to the time

[derekowens]

@TheDevilvivek Frequency is the number of oscillations in a given amount of time. It is typically measured in Hertz, and a Hertz is one oscillation per second. So a frequency of 440 Hz means 440 waves go past a given point in one second.

[TheDevilvivek]

at 1:45 you showed that when it reflect from mirror both rays meet together at eye yes or no

[derekowens]

@TheDevilvivek Yes, and that is necessarily the case. You will only see the rays that actually enter your eye.

[DrizztII]

Thank you again

[videologger123]

Why are the angles of reflection of the rays coming from the object (the solid yellow lines) different? Aren't they supposed to be the same because the mirror is a flat mirror?

[derekowens]

@videologger123 The two different rays are at different angles because they represent two different "lines of sight" and each line of sight is aimed at a different point on the object, one at the top and the other at the bottom. For a given ray, though, at the point at which it hits the mirror, the angle of incidence equals the angle of reflection.

Hope that helps,

DO

[videologger123]

@derekowens Thanks! One more thing, what are you using to make this illustrations?

Thank you so much.

[TheEihcnem]

this is cool! image formation on plane mirror is our next topic IV-Einstanians, Aristotlelians and Newtonians of Gogon National High School... pls. watch this... ^_^

[derekowens]

@TheEihcnem Excellent! Aristotelians, though! I didn't think there were any Aristotelians left in the physics world!

[TheEihcnem]

@derekowens i really like these videos regarding image formation its easy to understand....anyway...im referring to fourth year - Aristotle section...^_^

[vikhyat94]

image formed in the mirror cannot be taken on a screen.....but what happens when light rays fall on the mirror and can be taken on a screen??????

[fareeda1111]

wicked site yo

[sanjanap19]

these videos wil help us a lot.thanx

[andaninuman]

man, u r the best!!!!!

[saoh1014]

i learnt this today at school and i had no idea what my teacher was talking about but now i watched this video its all clear!! thanks! :)

[elight07]

Clear and to the point! Thanks!

[Matmo11]

Nice vids dude, helping me out with AP Physics.

Can I ask what program you use to make these videos? Not editing but like, the drawing on the screen. Both you and khacademy use it and I have wondered for a long time what the program is. Thanks man.

[Arlekean]

Great explanations, great drawings! I wish I could draw like that using the mouse or whatever you're using on these vids.

[shanu508]

it cleared all my doubts!!!

[OoOIvaNOoQ]

Very clear.

I was confused with these 2 types of image.

[Natiusdrock]

very good explanation--- better than words!!!!!!

[morolla16]

why couldnt i have found this when i actually took physics?

[xDaNiiO]

I have been watching all your Physics Videos for my GCSE Exam in a few days.

They have really helped and its so much clearer than reading it out of a text book.

Thank you so much!

[htimsnad2793]

why can u b my physics teacher :)

[Excitotoxin]

Wow - very clear explanation. Thank you.