Polarisation

The angle at which the intensity of transmitted light becomes maximum when a polarising sheet is rotated between two crossed polaroids is
[$\theta$ is the angle between transmission axes of first and middle polaroid]

Light, from a sodium lamp, is passed through two Polaroid sheets,  $P_1$  and  $P_2$  kept one after the other. Keeping  $P_1$  fixed,  $P_2$  is rotated so that its ‘pass – axis’ can be at different angles, $\theta$  with respect to the pass – axis of $P_1$ .

An experimentalist records the following data for the intensity of light coming out of  $P_2$  as a function of the angle $\theta$ .

$[I_0$  = Intensity of beam falling on  $P_1]$

One of these observations is not in agreement with the expected theoretical variation of I. Identify this observation.

Two polaroids are set in crossed positions. A third polariser is placed between the two making an angle $\theta$ with the pass axis of the first polaroid. In what orientations(of third polaroid with respect to first polaroid) will the transmitted intensity be (i) minimum and (ii) maximum?

A light ray incident from a medium $\left(\mu =\sqrt{3}\right)$ to another medium $\left(\mu =3\right)$ then the angle of polarization will be:

Two rays of light $A$ and $B$ are falling on a glass slab at the angles of incidence $45°$ and $60°$. If the reflected ray of $A$ is partially polarized and that of $B$ is completely polarized, then the refractive index of glass is

Find the polarization angle for a medium which has the critical angle of incidence equal to ${\sin }^{-1}\left(\frac{3}{5}\right)$.

A light whose electric field vectors are completely removed by using a good polaroid, allowed to incident on the surface of the prism at Brewster's angle. Choose the most suitable option for the phenomenon related to the prism.

Two polarisers are placed parallel to each other in the path of a beam of unpolarized light of intensity ${\mathrm{I}}_0$. The intensity of emergent beam is $\frac{{\mathrm{I}}_0}{2}$. If the first polariser is rotated about the line shown.

A beam of laser light is incident on an analyzer which is rotated on a spectrometer stage. If the intensity of the transmitted light changes from maximum to minimum (not zero), the nature of the incident beam is

Unpolarized red light is incident on the surface of a lake at a grazing angle $\theta$. An observer seeing the light reflected from the water surface through a polarizer notices that on rotating the polarizer, the intensity of light drops to zero at a certain orientation. The red light is replaced by unpolarized blue light. The observer sees the same effect with reflected blue light at a grazing angle ${\theta }^{\text{'}}$. Then,

A parallel beam of light, linearly polarized along the y-axis, passes through a combination of convex lenses and mirrors as shown in the figure. The output beam

Unpolarized light having an intensity $I_0$ passes through a stack of $4$ polarizers, the pass axis of each of the polarizer makes an angle of $30°$ with the axis of the preceding one. The intensity of light coming out of the last polarizer is

The refractive index of a certain medium (w.r.t. air) is $n=\sqrt{3}$. Unpolarized light traveling from air to this medium is partially reflected and partially transmitted. At what angle of incidence would the reflected light be fully polarized?

Two polarizers $A$ and $B$ are parallel to each other with the pass axis of $B$ inclined at an angle of $30°$ to that of A. A linearly polarized light of intensity $I_0$, having its direction of polarization at an angle $\theta$ with the pass axis of $A$, is incident normally on $A$ and passes through $B$. If the intensity of light transmitted through $B$ is $\frac{3}{8}{I}_0$, the angle $\theta$ is

Unpolarized light is incident on the surface of a transparent medium at such an angle of incidence that the reflected ray and the refracted ray travel at right angles to each other.

Find the polarization angle for a medium which has the critical angle of incidence equal to ${\sin }^{-1}\left(\frac{3}{5}\right)$.

An unpolarized beam of light of intensity$I$is incident on a set of four polarising plates such that each plate makes an angle $\frac{\pi }{3}$ with preceding sheet. The intensity of light transmitted through the combination is:

Assertion: The electromagnetic waves of all wavelengths can be polarise.

Reason: Polarization is independent of the wavelengths of electromagnetic waves.

Which of the following is uniaxial crystal?

Plane _____ light is made up of waves with the same direction of vibration for all of them. Light can be polarised through reflection or passing through filters, such as crystals, that transmit vibration in one plane but not in others.