The wavelength of light in air and some other medium are respectively `lambda_(a)` and `lambda_(m)`. The refractive index of medium is

The critical angle of a medium with respect to air is 45^(@) . The refractive index of medium is

The critical angle of a medium with respect to air is 45^(@) . The refractive index of medium is

The speed of light in a medium is high if the refractive index of the medium is ……. .

The wavelength of light in vacuum is 6000 A^(@) and in a medium it is 4000 A^(@) The refractive index of the medium is:

The wavelength of light in vacuum is 6000 A^(@) and in a medium it is 4000 A^(@) The refractive index of the medium is:

A ray of light travelling in air is incident at 45^(@) on a medium of refractive index sqrt(2) . The angle of refractive in the medium is