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The work function for copper is 4.5 eV. (a) Find the threshold frequency and wavelength for...

The work function for copper is 4.5 eV.

(a) Find the threshold frequency and wavelength for the photoelectric effect to occur when monochromatic electromagnetic radiation is incident on the surface of a sample of copper.
Hz
nm

(b) Find the maximum kinetic energy of the electrons if the wavelength of the incident light is 190 nm.
eV

(c) Find the maximum kinetic energy of the electrons if the wavelength of the incident light is 240 nm.
eV

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