On a photosensitive material, when freq...

On a photosensitive material, when frequency of incident radiation is increased by 30% kinetic energy of emitted photoelectrons increases from `0.4 eV` to `0.9 eV`. The work function of the surface is

A

1 eV

B

1 .267 eV

C

1 .4 eV

D

1 .8 eV

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The correct Answer is:

B

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