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The threshold frequency of a metal surfa...

The threshold frequency of a metal surface is 6.2 eV energy. Stopping potential for incident radiation is 5V. Then incident radiation lies in :

A

X-rays region

B

Ultraviolet region

C

Infrared region

D

Visible region.

Text Solution

Verified by Experts

The correct Answer is:
B
Here energy of photon `= omega_(0)+K.E`
`=6*2eV+5eV=11*2eV` which energy corresponds to that of ultraviolet rays.
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