Home Physics Wave Optics JEE Main 2025 Width of one of the two slits in a Young's d…
Physics Wave Optics JEE Main 2025 MCQ (Single Correct)

Width of one of the two slits in a Young's double slit interference experiment is half of the other slit. The ratio of the maximum to the minimum intensity in the interference pattern is:

A
3 : 1
B

C
9 : 1
D

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The correct answer is:
D

In Young's double-slit interference experiment, the width of one slit is half that of the other. The intensity, I, is proportional to the slit width. This gives us:

The maximum intensity, , occurs when the amplitudes add constructively:

The minimum intensity, , occurs when the amplitudes interfere destructively:

Now, using and , we find:

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