Optics Problems - Numerical 27

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27.

The ratio of the intensities at minima to maxima in the interference pattern is 9:25. What will the ratio of the widths of the two slits be in Young's double slit experiment?

Suggested solution:

Intensity is proportional to the width of the slit. So, amplitude is proportional to the square root of the width of the slit.

Here represent the widths of the two slits.