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 ▸Why are fringes are formed in the Young double slit experiment?
By considering Newton's second law and his law of gravitation, derive an expression for gravitational field strength g in terms of its mass, m, the distance from its center of mass, r, and the gravitational constant, G.
How do capacitors work and what are its units?
What is meant by the binding energy of a nucleus?