Module Assessment Question

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Jessica Li 4F
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Joined: Fri Aug 09, 2019 12:16 am

Module Assessment Question

Postby Jessica Li 4F » Mon Oct 21, 2019 5:46 pm

The question is "Photoelectric experiments gave rise to a new equation relating the energy of light to its frequency. Select the right equation."

Is the answer E = hv instead of the one with work function and kinetic energy, and why?

005391550
Posts: 103
Joined: Thu Jul 25, 2019 12:15 am

Re: Module Assessment Question

Postby 005391550 » Mon Oct 21, 2019 5:50 pm

the photoelectric experiments basically told us that energy is related to frequency so E = hv shows us this relationship. the work function and kinetic energy were parts of the photoelectric effect but they do not show us the relationship between E and frequency

kim 2I
Posts: 105
Joined: Thu Jul 25, 2019 12:17 am

Re: Module Assessment Question

Postby kim 2I » Mon Oct 21, 2019 7:55 pm

The correct answer in this case is E=hv since the question is solely asking about the energy of the light and its frequency. Since the question has nothing to do with the energy required to remove an electron from the metal, the only equation you would focus on is the equation of the incoming light (E=hv).


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