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The surface of a metal illuminated with ...

The surface of a metal 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 : `(hc=1240 eV.nm)`

A

3.09 eV

B

1.41 eV

C

1.51 eV

D

1.68 eV

Text Solution

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The correct Answer is:
B
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