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?

Waves from two different sources overlap near a particular point. The amplitude and the frequency of the two waves are the same.The ratio of the intensity,when the two waves arrives in the phase to that when they arrive 90^(@) out of phase is

Two waves of same amplitude superimpose to produce two beats per second. What is the ratio of minimum loudness to that of one of the waves?

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

Two waves of same frequency have amplitudes 5 cm and 3 cm, These waves are made to superpose in the same direction. The ratio of maximum intensity to minimum intensity at various places will be

Unpolarized light with intensity I_0 is incident on two polaroids. The axis of the first polaroid makes an angle of 50^@ with the vertical, and the axis of the second polaroid is horizontal. What is the intensity of the light, after it has passed through the second polaroid?

Equations of two progressive waves at a certain point in a medium are given by, y_1 =a_1 sin ( omega t+phi _1) and y_ 1 =a_2 sin (omegat+ phi _2) If amplitude and time period of resultant wave formed by the superposition of these two waves is same as that of both the waves,then phi _ 1-phi _2 is

Two beams, one of red light and other of blue light, of the same intensity are incident on a metallic surface to emit photoelectrons. Which one of the two beams emits electrons of greater kinetic energy?

A string consists of two parts attached at x=0 , The right part of the string (xlt 0) has mass per unit length mu_r and the left part of the string (xlt 0) has mass per unit length mu _l The tension in the string is T. If a wave of units amplitude travels along the left part of the string,what is the amplitude of the wave that is transmitted to the right part of the string?

A particle executes linear simple harmonic motion with an amplitude of 2 cm . When the particle is at 1 cm from the mean position the magnitude of its velocity is equal to that of its acceleration. Then its time period in seconds is