Estblish the relation between angle of friction and angle of repose .

What is angle of repose

Establish the relationship between angle of repose and coefficient of friction

Establish the relation among deviation of a ray, angle of incidence and angle of refraction.

Establish the relation of angle of deviation with angleA,i_1 and i_2

Give the relation between critical angle and refractive index

Critical angle between a given transparent medium and air is theta_( c) . A ray of ligth in air enters the transparent medium at an angle of incidence equal to the polarising angle. Deduce a relation between angle of refraction r and critical angle theta_(c ) .

The relation between angle of the prism and refractive index of the medium is:

Deduce a relation between polarising angle and critical angle.

In case of a moving coil galvanometer, what is the relation between the current I and the angle of deflection theta ?