If the 5th order minimum in the diffraction pattern is at 40°, what is the highest order minimum in the pattern?
A)6
B)11
C)8
D)7
E)9

Name: If the 5th order minimum in the diffraction pattern is at 40°, what is the highest order minimum in the pattern? A)6 B)11 C)8 D)7 E)9
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Quizplus · Accepted Answer

The highest order minimum occurs when sin(θ) = 1. For the 5th order minimum at 40°, sin(40°) = 5λ/d. The maximum order n is when sin(θ) = 1, so n = d/λ = 5/sin(40°). Calculating gives n ≈ 7.

If the 5th Order Minimum in the Diffraction Pattern Is