How is a wavefront defined? Using Huygens' prniciple draw a figure showing the propagation of a plane wave reflecting at the interface of the two media. Show that the angle of incidence is equal to the angle of reflection.

Angle of incidence is equal to angle of reflection

How is a wavefront defined? Using Huygens' prniciple draw a figure showing the propagation of a plane wave refracting at a plane surface separating two media. Hence verify Snell's law of refraction.

When a ray of light passes through a parallel slab of transport medium, then show that angle of incidence is equal to angle of emergence.

State Huygens' principle and use it to describe the process of reflection of a parallel beam of light incident on a plane mirror obliquely with the help of a labelled diagram.Prove that the angle of incidence is equal to the angle of reflection.

Define angle of repose and show that the coefficient of limiting friction is equalto tangent of repose. Hence show that angle of epose is equal to angle of friction.

Draw two figures which do not show rotational or reflection symmetry.

Draw a diagram to show the refraction of a plane wavefront incident on a convex lens and hence draw the refacted wavefront.