Question

The threshold wavelength of zinc is 390 nm.

1) Find the frequency of zinc

2) What is the work function in eVerything of zinc?

3) Zinc in a photocell is irradiated u ultraviolet light of 260 nm wavelength. What is the kinetic energy of the photoelectrons in eV?
bobpursley
1. f=c/wavelength

3. Workfunction=plancksconst*freq

3. figure the energy of 250 nm light, subtracat the work function, then the remainder energy is KE

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