Longitudinal waves cannot

'n' polarizing sheets are arranged such that each makes an angle $45^\circ$ with the preceding sheet. An unpolarized light of intensity $I$ is incident into this arrangement. The output intensity is found to be $I/64$. The value of $n$ will be

The transverse nature of light is shown by

Plane-polarized light passes through a Polaroid. While observing through the Polaroid,it is seen that when the Polaroid completes one rotation about the direction of light,which of the following is observed?

$A$ calcite crystal is placed over a dot on a piece of paper and rotated. On seeing through the calcite,one will see:

In the propagation of light waves,the angle between the direction of vibration and the plane of polarization is ....$^o$.