What is meant when it is said that the critical angle of diamond with respect to air is `24.4^@`?

What is critical angle?

What is critical angle?

State whether True or False:- Critical angle of a diamond with respect to air is very high.

State whether True or False:- Refractive index of diamond with respect to air is low.

If the absolute refractive index of a medium is sqrt2 , calculate the critical angle of glass to the medium. Given that the critical angle of glass to air is 30^(@) .

When an object is placed 20 cm away from a convax lens, no image is obtained on either side of the lens. What is the focal length of the lens? If the refractive index of glass with respect to air is 1.5, what is the refractive index of air with respect to glass?

wavelength of light in a medium is 4000 Å and that in another medium is 6000 Å . What will be the critical angle if light ray moves from first medium to second medium?

The refractive angle of a prism is 60^(@) . If the prism is immersed in a liquid then the minimum angle of deviation is 30^(@) . Critical angle of glass with respect to the liquid is

What do you understand by critical angle?