A substance has critical angle `45^@` for yellow light. What is its refractive index?

What is the unit of refractive index?

What is the significance of refractive index?

How polarising angle is related to refractive index?

What is the critical angle for materail of refractive index sqrt 2 ?

The polarising angle of a medium is 60^@ . What is refractive index of the medium?

What is the relation between critical angle and refractive index? What is critical angle for diamond?

Find the critical angle for a glass-water interface,if refractive index of glass 3//2 and that of water is 4//3 .

At what angle of incidence should light beam strike a glass slab of refractive index (mu=sqrt3) , such that the reflected and refracted rays are perpendicular to each other?