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Ultraviolet light of 6.2 eV falls on an ...

Ultraviolet light of `6.2 eV` falls on an aluminium surface (work function `= 4.2 eV`). The kinetic energy (in joule) of the fastest electron emitted is approximately.

A

`3.2 xx10^(-15)J`

B

`3.2 xx10^(-17)J`

C

`3.2 xx10^(-19)J`

D

`3.2 xx10^(-21)J`

Text Solution

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The correct Answer is:
C
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