Post- Module Assessment #24

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dstemp
Posts: 20
Joined: Fri Sep 29, 2017 7:07 am

Post- Module Assessment #24

Postby dstemp » Mon Oct 16, 2017 10:28 pm

In photoelectric experiments, typically what part of the electromagnetic spectrum is the incoming light? Also, to better my understanding, why does the light typically lie in a specific part of the spectrum. For example, why can't visible light eject electrons? Is it because the wavelength in the visible spectrum is simply too long?

Rachel Wang
Posts: 49
Joined: Fri Sep 29, 2017 7:04 am

Re: Post- Module Assessment #24

Postby Rachel Wang » Mon Oct 16, 2017 10:44 pm

I think UV light is typically used because it has sufficient energy (higher frequency than visible light) to eject e-.

dstemp
Posts: 20
Joined: Fri Sep 29, 2017 7:07 am

Re: Post- Module Assessment #24

Postby dstemp » Mon Oct 16, 2017 10:49 pm

Thank you, that makes sense. Do you know why gamma rays wouldn't work then, since they have an even higher freq?

Swetha Sundaram 1E
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Re: Post- Module Assessment #24

Postby Swetha Sundaram 1E » Thu Oct 19, 2017 1:50 pm

I think gamma rays would work, but UV light is just easier to use. I'm not completely sure though


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