Optics Question 1126

Question: In the Young’s double slit experiment with sodium light. The slits are 0.589 m a part. The angular separation of the third maximum from the central maximum will be (given l = 589 mm)

[Pb. PMT 2002]

Options:

A) sin1(0.33×108)

B) sin1(0.33×106)

C) sin1(3×108)

D) sin1(3×106)

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Answer:

Correct Answer: D

Solution:

Using relation, dsinθ=nλsinθ=nλd .

For n = 3, sinθ=3λd=3×589×1090.589

=3×106 or θ=sin1(3×106)



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