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 ▸A diver of mass 60kg stands on the end of a diving board (2m in length). Calculate the upward force exerted on the retaining spring which is 30cm from the start of the diving board.
When does a pendulum bob move fastest and why?
An electron is accelerated through a uniform electric field of strength, E= 20 [N/C]. Determine the speed after the the electron travels 0.5 m from rest.
Why is the index of refraction important for light passing between two materials?