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The surface of a metal is illuminated wi...

The surface of a metal is illuminated with the light of 400nm. The kinetic energy of the ejected photoelectrons was found to be `1.68eV`. The work function of the metal is `(hc = 1240 eV nm)`

A

1.41 eV

B

1.51 eV

C

1.68 eV

D

3.09 eV

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