Light obliquely travel from glass to air , critical angle of glass is `42^@`.
Angle of incidence is `42^@` find its refracted angle ?

What is the critical angle of glass?

Light obliquely travel from glass to air , critical angle of glass is 42^@ . What happens to the ray ofd light when the angle of incidence is 45^@ ? Explain the phenomenon ?

Light obliquely travel from glass to air , critical angle of glass is 42^@ . What is mean by critical Angle ? In which phenomenon we observe the incident angle is 40^@ ? Explain the phenomenon ?

A light ray is travelling from air to water. Velocity of light in water is 2.25 x 10^8 m/s If angle of incidence is 30° calculate angle of refraction