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### Question Wording on Photoelectric Effect

Posted: Wed Oct 12, 2016 10:38 pm
The question I'm stuck on asks for the lowest frequency of light that will cause photoelectric emission, and then the maximum energy of the electrons emitted. The wording is confusing me, does this involve an inequality?

### Re: Question Wording on Photoelectric Effect

Posted: Wed Oct 12, 2016 11:47 pm
If you can be more specific or provide the problem, then I can help more.

### Re: Question Wording on Photoelectric Effect

Posted: Wed Oct 12, 2016 11:56 pm
I'm pretty sure you are referring to one of the problems in the workbook and when it ask for lowest frequency of light that will cause photoelectric emission is simply asking what is the minimum frequency needed to generate enough energy to displace an electron. Which should be the frequency with energy equivalent to the work function. And for the maximum energy of the electrons emitted when light of 7.3 x 10^14 Hz is used, it is asking for the kinetic energy of the electrons ejected which you can recall is equal to the (energy of the light) - (work function). Hope I helped!

### Re: Question Wording on Photoelectric Effect

Posted: Thu Oct 13, 2016 1:14 am
Okay that helps thank you!

### Re: Question Wording on Photoelectric Effect

Posted: Sun Oct 16, 2016 4:20 pm
I also have a question on the wording involved with photoelectric effect problems. For example, in the quiz problems, what would "energy dissipated" be considered as? Would this be considered as the excess energy lost after reaching the threshold energy? If so, does that mean I could also say kinetic energy is the same as energy dissipated?