The surface of a metal is illuminated with the light of 400 nm. The ki – McqOptions

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1.	The surface of a metal is illuminated with the light of 400 nm. The kinetic energy of the ejected photoelectrons was found to be 1.68 eV. The work function of the metal is: \[\left( hc=1240eV.nm \right)\]
A.	1.41 eV
B.	1.51 eV
C.	1.68 eV
D.	3.09 eV
Answer» B. 1.51 eV

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