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When an electron in an excited state of Mo atom falls L to K -shell, an X -ray is emitted. These X -rays are diffranted at angle of ` 7.75^(@)` by planes with a sepration of 2.64Å . What is the difference in energy between K-shelll and L -shell in Mo, assuming a first order diffraction ? ` ( sin 7.75^(@) = 0.1349)

A

`36.88 xx 10^(-19) J`

B

`27.88 xx 10^(-16)` J

C

`63.88 xx 10^(-17) J`

D

`64.88 xx 10^(-16)` J

Text Solution

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The correct Answer is:
B
Properties of ionic solid
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