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The intensity of the light coming from o...

The intensity of the light coming from one of the slits in a Young's double slit experiment is double the intensity from the other slit. Find the ratio of the maximum intensity to the minimum intensity in the interference fringe pattern observed.

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The intensity of the light origiN/Ating from the first sit is double the intensity from the second slit. The amplitudes of the two interfering waves are in the ratio `sqrt2:1, say sqrt2 A and A.
At the point of constructive interference, the resultant amplitude becomes `(sqrt2+1)A.` At the points of destructive interference, this amplitude is `(sqrt2-1)` A. The ratio of the resultant intensities at the maxima to that at the minima is
`((sqrt2+1)^2A^2)/((sqrt2-1)^2A^2=34.`
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