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Wavelength of a 1 ke V photon is 1.24 xx...

Wavelength of a `1 ke V` photon is `1.24 xx 10^(-9) m`. What is the frequency of ` 1 Me V` photon ?

A

`1.24 xx 10^(15) Hz`

B

`2.4 xx 10^(20) Hz`

C

`1.24 xx 10^(18) Hz`

D

`2.4 xx 10^(23) Hz`

Text Solution

Verified by Experts

The correct Answer is:
B
`E = hv rArr v = ( E )/(h)`
`v = ( 1 xx 10^(6) xx 1.6 xx 10^(-19))/(6.6 xx 10^(-34)) = 2.4 xx 10^(20) Hz`
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