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a) A photon with a wavelength of 3.00x10-7 m strikes an electron at rest. The scattered...

a) A photon with a wavelength of 3.00x10-7 m strikes an electron at rest. The scattered photon has a wavelength of 4.00x10-7 m. Calculate the KE of the electron.

b) Light with a wavelength of 425 nm falls on a photoelectric surface that has a work function of 2.00 eV. What is the maximum speed of the ejected electron?

c) A photon of wavelength 43 nm is incident upon a metal in a photoelectric apparatus. A stopping voltage of 21 V is measured. What is the threshold frequency of the metal?

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