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

The intensity of light coming from one of the slits in Young's experiment is twice the intensity of light coming from the other slit. What will be the approximate ratio of the intensities of the bright and dark fringes in the resulting interference pattern?

If two interfering waves have intensities in the ratio 9: 1 ,then the ratio of maximum to minimum amplitude is

Two sources of sound of intensity I and 4I are used in an interference of sound experiment. Then the intensity of sound at a point where the waves from the two sources superimpose with a phase difference of (pi /2) rad is

In Young's double slit experiment , the two coherent sources have different intensities . If the ratio of maximum intensity to the minimum intensity in the interference pattern produced is 25 : 1 . What was the ratio of intensities of the two sources ?

If the ratio of amplitude of two waves is 4:3 , then the ratio of maximum and minimum intensity is

The ratio of intensities between two coherent sound sources is 4 : 1. The difference of loudness in decibles (dB) between maximum and minimum intensities, on their interference in space is

In interference with two coherent beams of light , the fringe width is

A beam of red light has an amplitude 2.5 times the amplitude of second beam of the same colour. Calculate the ratio of the intensities of the two waves?