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If a source of power 4 kW produces 10^(2...

If a source of power `4 kW` produces `10^(20)` photons`//`second, the radiation belongs to a part of the spectrum called:

A

Ultraviolet rays

B

Microwaves

C

`gamma-rays`

D

X-rays

Text Solution

Verified by Experts

The correct Answer is:
a
Given, `P=4kW=4000W, n=10^(20)` photon/s.
`P=nxxhv`
or `v=P/(nh)=4000/(10^(20)xx6.63xx10^(-34))`
`~~6xx10^(16)Hz`.
This frequency radiation belongs to ultraviolet
rays.
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