The work function for metallic Cu is 4.7 eV. Cu is irradiated with 195 nm light....

The work function for metallic Cu is 4.7 eV. Cu is irradiated with 195 nm light. (a) Calculate the kinetic energy, the speed, and the wavelength of electrons ejected due to the photoelectric effect, (b) A 5-watt LED light emits 195 nm light at a Cu film. Calculate the number of electrons emitted per second. Would a 10-watt LED eject more electrons, faster electrons, or both? (c) Find the maximum wavelength of light that could eject electrons from Cu.

For part a, I am confused about finding the wavelength as shouldn't the wavelength just be 195 nm? For part b, can we use the Boltzman equation? If so, would the 5-watt and 10-watt be considered energy levels? I'm still thinking about part c...

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genius_generous answered 1 year ago

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