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When the energy of the incident radiatio...

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

1.5 eV

B

0.65 eV

C

1.0 eV

D

1.3 eV

Text Solution

Verified by Experts

The correct Answer is:
3
`E = W + k rArr E = W + 0.5`
`(6E)/(5) = W + 0.8 rArr (6E)/(5) = W + 0.8`
E = 1.5 eV
so W = 1.0 eV
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