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if the frequency of Ka X-ray emitted fro...

if the frequency of `K_a` X-ray emitted from the element with atomic number 31 is f, then the frequency of `K_a` x-ray emitted from the element with atomic number 51 would be

A

`5/3v`

B

`51/31v`

C

`25/9v`

D

`9/25v`

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The correct Answer is:
C
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