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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

`2.4xx10^(15)Hz`

B

`2.4xx10^(20)Hz`

C

`1.24xx10^(15)Hz`

D

`1.24xx10^(20)Hz`

Text Solution

Verified by Experts

The correct Answer is:
B
Given, `hc//lamda=10^(3)eV` . . (i)
`hv=10^(6)eV` . . . (ii)
Dividing eq. (ii) by eq. (i), we get
`v=10^(3)c//lamda=10^(3)xx3xx10^(8)//1.24xx10^(-9)`
`=2.4xx10^(20)Hz`
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