Which one of following is not describing the photoelectric effect?

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RaniyaFeroz_1E
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Which one of following is not describing the photoelectric effect?

Postby RaniyaFeroz_1E » Tue Oct 06, 2020 9:56 pm

Which one of following is not describing the photoelectric effect?

A. E (photon) – E (remove e-) = E (excess)

B. E (photon) – E (remove e-) = EK (e-)

C. hv - work function = 1/2mv2

D. λv = c

E. None of the above

I though it was none of the above because I saw all the equations when working on the module and watching the video, but that was wrong. Can someone explain what the right answer is? Thank you!

Arielle Sass 2A
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Re: Which one of following is not describing the photoelectric effect?

Postby Arielle Sass 2A » Tue Oct 06, 2020 11:53 pm

Other people please correct me if I’m wrong but I believe the correct answer is D, c= λv, because although the equation is true (the speed of light equals wavelength times frequency), it doesn’t describe the “photoelectric effect,” it just describes the relationship of frequency and wavelength in light. The specific situation where light hits a metal surface and an electron is released is described by the other equations.

Andrew Wang 1C
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Re: Which one of following is not describing the photoelectric effect?

Postby Andrew Wang 1C » Wed Oct 07, 2020 3:44 pm

I also thought it was E at first, but Arielle is correct that the answer is D. My reasoning was that although λv = c is used in photoelectric effect problems, it isn't specific to the photoelectric effect itself, while the other three equations are.

Hope this helps!

Kailani_Dial_2K
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Re: Which one of following is not describing the photoelectric effect?

Postby Kailani_Dial_2K » Wed Oct 07, 2020 3:53 pm

I agree with the two other people who have posted. I think that all of the other equations that are given were either derived or experimentally found through the photoelectric effect experiment where as the equation λv = c was already established before this experiment. Anyone can correct me if I am wrong.


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