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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

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The correct Answer is:
B
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