A) \[{{n}^{-1/2}}\]
B) \[{{n}^{1/2}}\]
C) \[{{n}^{2}}\]
D) \[n\]
Correct Answer: B
Solution :
In diffraction of half period zone\[r\propto \sqrt{n}\,r\propto {{n}^{1/2}}\]
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