The intesity ratio in interference pattern is 4:1. Calculate the ratio of slit width.

Two coherent sources whose intensity ratio is 81 : 1 produce interference fringes. Calculate the ratio of intensity of the maxima and minima in fringe system.

In Young's experiment the ratio of intensity at the maxima and minima in the interference pattern is 36:16. What is the ratio of the widths of the two slits?

In Young's double slit experiment, the ratio of intensity at the maxima and minima in the interference pattern is 25 : 9 . What is the ratio of the widths of the two slits ?

Define moment of inertia and radius of gyration. Deduce an expression for MI of a circular disc about an axis passing through its centre. Two circular discs have their masses in the ratio 1:2 and their diameters 2:1 . Calculate the ratio of their moments of inertia

in a vessel the ratio of helium and oxygen are in ratio 3:5. Calculate the ratio of no. of molecules.

Two soap bubbles have radii in the ratio 2 : 3. Calculate the ratio of work done in blowing these bubbles.