(a) It is possible to transform unpolarised light in the polarised light. Polarised light waves ore light waves in which the vibration occur in a single plane, the process of transforming unpolarised into polarised is know as polarisation .
Brester angle of incident at which light with a particular polarisation is perfectly transimitted throught a transperent dielectric is perfectly transmitted throught a transparent dielectric surface. With no relflection when unpolarised light is incident at this angle, the light thal is reflected from the surface is polarised.
(b) `U = 1//sin C" "[mu "is refraction index"]`
`U_(2)//U_(1)` and C is critical angle `3//2//4//3 = 1//sin C`
`9//8 = 1//sin C`
`sin C = 8//9`
C= approx `62.73^(@)` ray is perpendicular therefore, would not show any refraction or any reflection.
While incident ray reaches AC it would make a triangle with angle of prizm `60^(@)` and perpendicular Angle. Now angle of incident ray with ax is `180-60+90= 30^(@)`
Angle of incident `= 90-30 = 60^(@)`
Since, angle of incident is less than critical angle. Ray will not suffer TIR.
