Find the angle at which total internal refraction takes place when light is going from glass to air.
The angle at which this takes place is called the critical angle.
We can apply Snell's law in this situation: n1 sin C1 = n2 sin (90deg)
sin C = n2 / n1
If the second medium is air, then n2 ~1, so sin C = 1/ n1
CT
Related Physics A Level answers
All answers ▸What is the maximum height a pole vaulter could reach?
Explain the process of annihilation?
Describe and explain the photoelectric effect (6 marks)
A ball is dropped from rest at a height of 2 metres. Assuming acceleration due to gravity (g) is 10m/s^2 calculate the velocity of the ball just before it hits the floor.