(a) Show using a proper diagram how unpolarised light can be linearly polarised by reflection from a transparent glass surface.
(b) The figure shows a ray of light falling normally on. the face AB of an equilateral glass prism having refractive index 3/2, placed A in water ofrefractive index 4/3. Will this ray suffer total internal reflection on striking the face AC? Justify your answer.

Explanation

(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.