This was a popular question. Candidates were able to us the definitions of the two concepts to distinguish between them. They were also able to state correctly two uses of polaroids. Performance was commendable.
The expected answers are:
Plane polarization Interference
is the confinement of vibration is the effect produced when two waves
(of waves) to one plane of the same frequency / wave length and
amplitude travelling in the same direction in a medium are super imposed
is an attribute of transverse is an attribute of both transverse and
waves only longitudinal waves.
(b)
Two uses of Polaroid’s
Production/determination of
- 3-dimensional films
- concentration of sugar solution/saccherometry
- polaroid cameras
- sun glasses