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The work function for copper is 4.7eV. a) Find the minimum wavelength for which photo-electrons are...

The work function for copper is 4.7eV.

a) Find the minimum wavelength for which photo-electrons are shed

b) What is the energy of the photo-electron if the incident light is 200nm?

c) What happens to the photocurrent and the braking voltage if the intensity of the light is doubled?

d) What happens if the frequency of the light is doubled?

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