Polarization of Light by Scattering and Refraction

The reflection index of water is $4/3$ and that of glass $3/2$. A beam of light travelling in water enters into glass. At the angle of incidence, the reflection ray will be pillorized$\left[{\tan }^{-1}\left(1.3\right)=48°\right]$. 

Yellow light indicate on smooth surface of block of dense fliest glass for which refractive index is $1.66$. Angle of refraction is ($(\mathrm{if} {\tan }^{-1}(1.66)=59°)$ 

Assertion: On viewing the clear blue portion of the sky through a Calcite Crystal, the intensity of transmitted light varies as the crystal is rotated.
Reason: The light coming from the sky is polarized due to the scattering of sunlight by particles in the atmosphere. The scattering is largest for blue light.

Light transmitted by a Nicol prism is:

Discus about Nicol prism.

Mentioned the type of optically active crystals with example.

Discus about pile of plates.

Unpolarised red light is incident on the surface of a lake at 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 incident angle ${\theta }_B$.

Then,

Which of the following is a new method of checking the purity of an organic compound?

Define Nicole prism.

Define plane polarised light?

Which of the following crystals are used to convert ordinary light to plane polarised light?

How is ordinary light converted to plane polarised light?

What do you mean by double refraction?

The tourmaline crystal: