Energy in photoelectric effect problems

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Sydney Takeda 2I
Posts: 62
Joined: Fri Sep 28, 2018 12:17 am

Energy in photoelectric effect problems

Postby Sydney Takeda 2I » Sun Oct 07, 2018 6:47 pm

While doing these types of problems it gets a little confusing determining which type of energy (photon, required to remove e-, or excess/kinetic) either for which I'm solving or given. Are there any key words within a question to look for to help differentiate them?

Meachelle_Lum_1I
Posts: 92
Joined: Fri Sep 28, 2018 12:24 am

Re: Energy in photoelectric effect problems

Postby Meachelle_Lum_1I » Sun Oct 07, 2018 7:52 pm

Hi! Here's a little legend to help:
If problem asks-
Amount of energy to remove electron = work function
Number of photons= usually means amount of INCOMING light
Excess energy=kinetic energy=1/2mv^2
Also, a general formula to help:
Energy(photon) - Energy to remove e- = Kinetic energy of electron (excess)


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