Module Question

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Kimberly Bauer 4E
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Joined: Thu Jul 25, 2019 12:17 am

Module Question

Postby Kimberly Bauer 4E » Mon Nov 04, 2019 3:34 am

Molybdenum metal must absorb radiation with a minimum frequency of 1.09 x 1015 s-1 before it can emit an electron from its surface. Answer the following two questions.
A. What is the minimum energy needed to produce this effect?

How do I solve this problem?

christabellej 1F
Posts: 98
Joined: Sat Aug 17, 2019 12:17 am

Re: Module Question

Postby christabellej 1F » Mon Nov 04, 2019 7:49 am

This question is a photoelectric effect questions, and gives you the minimum frequency needed to eject an electron from the molybdenum metal surface. This means that any frequency lower than this will not eject any electrons and that with this particular frequency, there won't be any excess kinetic energy. You can use the E=hv equation to find out the minimum energy needed to eject the electron. E = (6.626*10^-34)(1.09*10^15).

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