Millikan Oil Drop Experiment

[hersh94]

Sick, exam tmrw, this helped :)

[11111bell]

ช่วยแปลให้หน่อยนะค่ะว่าเขาพูดว­่าไรบ้าง

[cya740]

Just wondering is the transcription coming soon?

[ReschJodSchin94]

Thank you!

[USAmilitarypower]

they say gravity wont change the speed something falls... does anyone know why this dosnt happen here.

[Varbai]

nice !



[judaleba]

o si ahora entiendo mejor este experimento GRACIAS :D

[flageyme]

Excellllllllllllllllllllllllll­lllllent !!!



[Ahelterpro]

science sux god bless you

[5starcathy]

its really great........... thanks a lot for this. helps me a lot

[crudeoilsystems]

great to see so many people get help in their exams from this vid

[ppadmaperuma]

Poor Immature Bastards!! Lolz :D

[adamtickle]

Which brings me to my point, it must have been hard, in 1909 to come up with the right answer, without the ability to do incredibly complex math more accurately. So DICK my reasoning for questioning the validity of this bitch isn't as moronic and dull as your passive aggression. EAT A DICK.

[adam3141]

@adamtickle Passive aggression? Really? I think that maybe you should take a long hard look in the mirror.

You need to do some growing up, and fast because at 26, you're acting half your age.

[adamtickle]

@adam3141 Man, it sounds like you must have a tiny penis. I think you shouldn't take a look in the mirror for the sake of your self-esteem. When I was 13 my dick was bigger than yours will ever be. Now THAT'S acting half my age :)

[cuntylishus]

@adamtickle @adam3141 Well played, chaps. Most entertaining.

[virtuosoikingpin]

It is so irritating how textbooks are written. This is so simple, yet the textbook makes you spend 4x longer learning it, simply by how complex it is written, and how much irrelevant information is included, which could be deduced if the first description had been written clearly in the first place. Plus ADHD people have trouble focusing on the piece of shit text. /end rant

[adamtickle]

yeah this makes sense. My question is. How the FUCK did this Millikan guy figure out that 1.6 X 10 to the negetive 19 was the smallest possibe multiple for the charge. How can that be?

[virtuosoikingpin]

@adamtickle You just find a number that all of the results will go into...lets see the charges on them are 8, 10, 12,14,16.. You would eventually figure out that they're all multiples of 2. He did some complex math to figure it out but I believe this is the basic concept.

[adamtickle]

@virtuosoikingpin but how could he, practically speaking, accurately find that 1.6*10 to the negetive 19 was the smallest multiple, i mean what instrument did he use, and if he was so sure that 1.6*10 to the negetive was the lowest he would have had to have some instrument that can measure charges well lower than that.

[adam3141]

@adamtickle The instrument he used was his brain which if used correctly is a very powerful tool. You see, he would have found in making his measurements that the numbers clustered around certain values and he must have performed this experiment thousands of times and so built up a reasonable amount of data points.

From this, he was able to see (and just like virtuosoikingpin said) that the multiple was 1.6x10^-19.

[adamtickle]

@adam3141 Ok dickhead, I understand the procedure, and I question the validity of the results. There are so many factors that reputable scientists have questioned including the fact that Milikan and Fletcher had an incorrect value for the viscosity of air among other undoing factors. In the expirements after this one scientist found the magic number to be higher and higher. The fact is scientist don't like to say that they may have been wrong and so they skirt issues......

[adamtickle]

@adam3141 Like the possiblity that they could have been wrong. As of 2008 the accepted value for the elementary charge is 1.602176487(40)×10−19C,[8] where the 40 indicates the uncertainty of the last two decimal places. In his Nobel lecture, Millikan gave his measurement as 4.774(5)×10−10statC,[9] which equals 1.5924(17)×10−19 C. The difference is less than one percent, but it is more than five times greater than Millikan's standard error, so the disagreement is significant....

[winkingfairy]

this iz soo helpul thnx :)

[SandyCheeks12692]

Man. . .you can find anything on youtube! lol.

[larrybardo]

this video is wrong on the charge.

if the x-ray knocks off electrons and leaves the oil droplet positively charged, then the measurement is not about electron but positron or positive charge.

on the other hand, if the x-ray does produce a negatively charged oil droplet, then the charged plates will move the oil droplet upward. However, how does the x-ray provide such negatively charged oil droplet? by knocking off a positive charge?

Hence the question is what charge is measured.

[bennyathwal]

@larrybardo The x ray knocks off electrons from the surrounding gas. These electrons then attach to the oil droplets thus giving them a negative charge. The x ray does not knock off electrons from the oil. hope this clears up things.

[14Amanda18]

Cleared up a lot of things, thanks!

But if the bottom plate is negatively charged, wouldn't the electrons be repelled from it? :S I think I'm missing something...

[KivaCrystal]

@14Amanda18 : When measuring the mass, the plates are switched off so the charge can fall freely

[tacosRme]

so an oil droplet is an electron?

[ThePastelPanda]

This helped me on my chemistry study guide, thank you! I understand now! ;)

[Derbear247]

pig anus

[beverleykatherine]

@Derbear247 i get it now, thanks for that insightful comment!!!!!!!!!

[emperormax]

@nqm23 a gamma source would also ionize the droplets.

[rachylelisabeth]

four people dont understand this video

[Oochia]

Very usefull and far more straight forward than a lot of other explanations on the web. Thankyou:)

[hsh31]

i need more details !

[state999999]

great experiment

[Loriebelle16]

i need this video for our presentation ..

tnx ..;)

[The4LA2Baker0]

provocative and intriguing.

this video reminds me of Coral Castle, watch?v=Hr9U1cP68eU.

[yunrui1989]

simple and elegant. job well one! thanks. only if i watched this before read the book !

[yunrui1989]

very nice demo :)

thx.

[Amato1Allah]

GREAT!

[MHaroonShahzad]

thanks

[CradLeRcker]

thx need this for exam tday lol

[und3rgr0undb]

thanks for posting this!

[RichKing14]

forgot one important aspect, there was a light source inside the apparatus that allowed Millikan to view the droplets.

[iceskater1]

i have a question, what would change about the oil drops charge if charge wasn't quantized?

[daviberto]

In a thinked experiment, imagine a drop with certain charge raising in the electric field, then if we add more charge, it raise more rapidly, but the change in velocity isn't continous.

But i think in reality that they obtained a lot of values of charge of different droplets and they realized that those values where approximately multiples of the lowest value... 1.6E-19.

[kimcatrnscc]

helpful.....

[franciscolima278]

really helpful. great job ;)

[Saira93]

W O W ~ 8D

[esekgoezluem]

good job

[pulguita110]

thanx i finally understand this :)

[libbeingcool]

helpful

i liked it