A) \[|{{P}_{y}}|>h\]
B) \[|{{P}_{y}}|<h\]
C) \[|{{P}_{y}}|=h\]
D) \[|{{P}_{y}}|>>h\,\]
Correct Answer: A
Solution :
[a] From Bragg's equation \[d\sin \theta =\lambda \text{ }\sin \theta =\frac{\lambda }{d}<1\] \[\therefore \lambda <d\] \[\frac{h}{|{{p}_{y}}|}<d\left[ \because \lambda =\frac{h}{|{{p}_{y}}|} \right]\] \[\therefore h<|{{p}_{y}}|d\]
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