The polarizing angle of glass is $57^{\circ}$. $A$ ray of light which is incident at this angle will have an angle of refraction as (in $^{\circ}$)

The angle of incidence of light falling on a material is $60^{\circ}$,and the reflected light is completely polarized. The speed of the refracted ray inside the material (in $m/s$) is:

Choose the $CORRECT$ statement from the following. Brewster's angle for a transparent medium is

Unpolarised red light is incident on the surface of a lake at an incident angle $\theta_{R}$. An observer seeing the light reflected from the water surface through a polariser notices that on rotating the polariser,the intensity of light drops to zero at a certain orientation. The red light is replaced by unpolarised blue light. The observer sees the same effect with reflected blue light at an incident angle $\theta_{B}$. Then,

When unpolarized light is incident at an angle of $60^{\circ}$ on a transparent medium from air,the reflected ray is completely polarized. The angle of refraction in the medium is (in $^{\circ}$)

The Brewster angle for air to glass transition of light is (Refractive index of glass $= 1.5$).