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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

`3.2xx10^(-21)`

B

`3.2xx10^(-19)`

C

`3.2xx10^(-17)`

D

`3.2xx10^(-15)`

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AAKASH INSTITUTE-DUAL NATURE OF RADIATION AND MATTER -ASSIGNMENT SECTION A. Objective (Only one answer)
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