Optics Question 1067

Question: In Young’s double slit experiment, if the slit widths are in the ratio 1 : 9, then the ratio of the intensity at minima to that at maxima will be

[MP PET 1987]

Options:

A) 1

B) 1/9

C) 1/4

D) 1/3

Show Answer

Answer:

Correct Answer: C

Solution:

Slit width ratio = 1 : 9 Since slit width ratio is the ratio of intensity and intensity (amplitude)2

I1:I2=1:9

a12:a22=1:9a1:a2=1:3

Imax=(a1+a2)2,  Imin=(a1a2)2IminImax=14



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