Wave front is locus of all the points where the particles of the medium vibrate with the same
phase
amplitude
frequency
period
Write Huygen's principle and principle basically composited ?
Huygens' concepts of secondary wavelets
Explain the refraction of a plane wavefront with a thin convex mirror.
The idea of secondary wavelets for the propagation of a wave was first given by
A light beam is incident on a denser medium whose refractive index is $1.414$ at an angle of incidence $45^o$ . Find the ratio of width of refracted beam in a medium to the width of the incident beam in air