Question 1 | 5MARKS
(a) Use Huygens's geometrical construction to show how a plane wave front
at t=0 propagates and produces a wave front at a later time t.
(b) Verify using Huygens's principal Snell's law of refraction of a plane wave propagating
from a denser to a murer medium.
(c) Illustrate with the help of diagrams the action of a conver lens and concave mirror on a
plane wave front incident on it.