Electrons are ejected from a certain metallic surface with, Ask an Expert

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Electrons are ejected from a certain metallic surface with speeds ranging up to 4.2 105 m/s when light with a wavelength of ? = 615 nm is used.

(a) What is the work function of the metal?
Incorrect: Your answer is incorrect. J
(b) What is the cutoff frequency for this metal?
Hz

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