Define refractive index.

To determine refractive index of glass slab using a travelling microscope, minimum number of readings required are :

A critical angle for a medium is 60^@ . Then the refractive index of the medium will be

Write two definitions and equations of relative refractive index.

Focal length of convex lens having refractive index 1.5 is 2 cm. If this lens is dipped in a liquid having refractive index 1.25 its focal length will be ...... cm.

A ray of light passes from a medium A having refractive index 1.6 to the medium B having refractive index 1.5. The value of critical angle of medium A is ....

Refractive index of water is 4/3 and that of glass is 3/2 . What is the refractive index of glass with respect to water ?

The relative refractive index of water with respect to air is Then relative refractive index of air with respect to water is

Refractive index of glass relative to water is 9/8. What is the refractive index of water relative to glass? (AS_(1))

Write equation of refractive index of from refraction through prism.

In optical fiber the refractive index of the material of the core is………. That of the cladding.