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When the energy of the incident radiation is increased by `20 %` , kinetic energy of the photoelectrons emitted from a metal surface increased from `0.5 eV to 0.8 eV`. The work function of the metal is

A

`0.65eV`

B

`1.0eV`

C

`1.3eV`

D

`1.5eV`

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The correct Answer is:
B
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