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The work function of a metal is 4.2 eV. ...

The work function of a metal is 4.2 eV. If radiations of `2000Å` fall on the metal, then the kinetic energy of the fastest photoelectron is:

A

`1.6 xx 10^(-19)J`

B

`1.6 xx 10^(-10)J`

C

`3.2 xx 10^(-19)J`

D

`6.4 xx 10^(10)J`

Text Solution

Verified by Experts

The correct Answer is:
C
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