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The wavelength of a 1 keV photon is 1.24...

The wavelength of a 1 keV photon is 1.24 nm. The frequency of 1 MeV photon is :

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 ^(24) Hz`

Text Solution

Verified by Experts

The correct Answer is:
B
`f = (c)/(lamda ) = (c )/( hc //E) = (E)/(h)`
`therefore f = (1 xx 1.6 xx 10 ^(13))/(6.6 xx 10 ^(-34) ) = 2. 4 xx 20 ^(20) Hz `
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