The intensity of light is directly proportinal to the square of the amplitude of the wave. (Yes/No)

In the wave picture of light, intensity of light is determined by square of the amplitude of wave. What determines the intensity of light in the photon picture of light.

Show that the radius of Bohr's orbit is directly proportional to the square of the principal quantum number.

Ratio of intensity of two waves is given by 4:1. Then, ratio of the amplitude of the two waves is:

de-Brogile waves are matter wave. (Yes/No)

What will be the intensities of the maxima and minima,when the ligth waves interfering with each other are of the same amplitude?Show that the intensity of the maxima is four times the intensity of light due to each of two slits.

Two polarised are placed at 90^@ to each other and the intensity of transmitted light is zero. What will be the intensity of transmitted light, when one or more polaroids is placed between these two bisecting the angle between them? Take intensity of unpolarised light as I_0 ?

Is it necessary for the produuction of bearts that the amplitudes of the two superposing waves should be the same?

If a polaroid is kept in the path of a uniformly unpolarised light ,the intensity of the transmitted light to the intensity of the light ,when the polaroid is not kept in its path,is

When an unpolarised light intensity I_0 is incident on a polarising sheet ,the intensity of the light which does not get transmitted is