Light with wavelength ? = 635 nm is incident on a metallic surface. Electrons are ejected from the surface. The maximum speed of these electrons is v = 4.40 ✕ 105 m/s. a) What is the work function of the metal (in eV)? b) What is the cutoff frequency for this metal (in Hz)?

Principles of Physics: A Calculus-Based Text
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Chapter28: Quantum Physics
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Light with wavelength ? = 635 nm is incident on a metallic surface. Electrons are ejected from the surface. The maximum speed of these electrons is v = 4.40  105 m/s.

a) What is the work function of the metal (in eV)?

b) What is the cutoff frequency for this metal (in Hz)?

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