Optics Question 155

Question: In Young’s double slit experiment how many maxima’s can be obtained on a screen (including the central maximum) on both sides of the central fringe if λ=2000AA and d=7000AA

Options:

A) 12

B) 7

C) 18

D) 4

Show Answer

Answer:

Correct Answer: B

Solution:

For maximum intensity on the screen dsinθ=nλsinθ=nλd=n(2000)7000=n3.5

Since maximum value of sinθ is 1 So n=0,1,2,3, only.

Thus only seven maximas can be obtained on both sides of the screen.



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