(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A metal gives off photoelectrons with maximum kinetic energy Kmax at the rate of N per second when a beam of light of wavelength λ shines on it. How will Kmax and N change if the intensity (brightness) of light is doubled? Assume 100% efficiency.

2. Relevant equations

hc/wavelength=? then. P/?=

h=planks constant

c= speed of light

p=power

3. The attempt at a solution

kinetic energy will remain the same

n will double

Im not sure how to do this problem

if the brightness doubles, will the frequency double? or the wavelength?

and im not sure how that would affect n per second

so what im basically asking is. Is the intensity of light related to the frequency, and if so, in what way?

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# Homework Help: Photoelectrons and Kmax

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