Two coherent sources have intensities in the ratio 25: 16. Find the ratio of intensities of maxima to minima after the superposition of waves from the two source.

The diameters of two cylinders having the same height are in the ratio 2: 3 . a) What is the ratio of their radii? b) What is the ratio of their volumes? c) If volumes of two cylinders having the same height are in the ratio a : b , then what is the ratio of their radif?

Light waves from two coherent sources having intensities I and 2I cross each other at a point with a phase difference of 60°. What is the resultant intensity at the point?