Many candidates failed to give acceptable distinction between plane polarization and
interference as applied to waves. However, listing of two uses ofpolaroids posed no
problem to them.
The expected answers are:
(a) Any 2 correct pair
e.g.
(b) Any two correct uses of polaroids 2 x
1/2 mark
e.g They are used in:
production of 3-dimentional films
determination of concentration of sugar solution
polaroid cameras
sun glasses.
