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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

`1.0 eV`

B

`1.3 eV`

C

`1.5 eV`

D

`0.65 eV`

Text Solution

Verified by Experts

The correct Answer is:
A
`E = W+K`
`E =W+0.5` …(i)
`1.2 E=W+0.8` …(ii)
(ii)/(i)
`1.2 =(W+0.8)/(W+0.5)implies 1.2 W+0.6 =W+0.8`
`W=1 eV`
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