(a)(i) In polarization vibration of wave is in one plane while interference is an effect produced when two-waves of the same wave length or amplified or frequency travelling in the same direction in a medium are super imposed.
(ii) Only transverse waves can be polarised while in interference both transverse and longitudinal waves are involved.
(b) Uses of polaroids are in:
- sunglasses
- Polaroid cameras
- Products on the 3-dimensional films, and
- determination of sugar solution concentration.