Photoelectric Module #12

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Uyenvy Nguyen 1D
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Photoelectric Module #12

Postby Uyenvy Nguyen 1D » Fri Oct 16, 2020 12:37 am

#12 says: In a photoelectric experiment light hits a metal surface and if the energy of the ________ light is ________ enough it causes electrons to be ejected from the metal surface.
A. outgoing, large

B. outgoing, small

C. incoming, large

D. incoming, small

E. None of the above

Does anyone know which one this would be? I know it's not E.

Isaac Wen
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Re: Photoelectric Module #12

Postby Isaac Wen » Fri Oct 16, 2020 1:05 am

Hola Uyenvy hehe

It's C. Incoming, Large!

Isaac Wen
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Re: Photoelectric Module #12

Postby Isaac Wen » Fri Oct 16, 2020 1:08 am

We can translate the question into an equation: E (incoming photon) - Φ (Work Function) = Ek (outgoing). Basically, the E for incoming must be larger than the Φ in order for the electron to be ejected.

Audrey Han 3L
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Re: Photoelectric Module #12

Postby Audrey Han 3L » Fri Oct 16, 2020 1:10 am

The energy of the incoming (incident) light has to be large enough (with high enough frequency or with enough energy per photon) in order for electrons to be ejected.

Violet Kwan 3H
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Re: Photoelectric Module #12

Postby Violet Kwan 3H » Fri Oct 16, 2020 2:24 am

It would be C. The incoming light is the incident light that is shone on the metal surface. In order for it to shoot off electrons, that light has to be larger than or equal to the work function. If it is too small, it would not have enough energy to shoot off the electrons. :)


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