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Ultraviolet radiation of 6.2 eV falls on...

Ultraviolet radiation of 6.2 eV falls on an aluminium surface with `W_0=4.5eV` . The kinetic energy in Joules of the fastest electron emitted is approximately :

A

`3xx10^(-21)`

B

`3xx10^(-19)`

C

`3xx10^(-17)`

D

`3xx10^(-15)`

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The correct Answer is:
B
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MODERN PUBLICATION-UNIT TEST PAPER - NO.8-EXERCISE
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