Question

state the condition for total internal reflection?
answer this fast I need it​

Answer 1

Answer:

The light must be travelling from a more dense medium into a less dense medium (ie glass to air) the angle of incidence must be greater than the critical angle.

Answer 2

Answer:

There are two conditions for total internal reflection of light to take place : (1) Light has to travel from denser medium to rarer medium but not vice-versa. where n is the refractive index. Angle of incidence θ must be greater than the critical angle of medium θc .