Published by:
CGP EDU Academic Team
Published on: August 12, 2026
At what angles for the first order diffraction, spacing between two planes respectively are λ and 
?
Text Solution
Verified by ExpertsThe correct answer is:
C
n × λ = 2d sin θ
In first case, 1 × λ = 2 λ sin θ
or sin θ = 
= sin 30 0 or θ = 30
0 In second case, 1 × λ = 2 × 
× sin θ
or sin θ = 1 = sin 90
0 or θ = 90
0
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