Answer to Question #144027 in Electric Circuits for kmt

Electric Circuits

Question #144027

What is the threshold frequency of metal if its work function is 4.0 eV and wavelength of 700nm is incident on it?

Expert's answer

Solution

Work function is given by

"\\phi=\\frac{hc}{\\lambda_0}=4.0eV"

"\\lambda_0=\\frac{1240eV-nm}{4.0eV}=3100A^0"

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