Question

When a ray of light traveling from vacuum to a
medium of refractive index Hi, the angle of
incidence is twice the angle of refraction. The
incident angle is
​

Answer 1

Answer:

When light enters the boundary of two surfaces at right it passes normally without deviation. This is because here angle of incidence at the boundary of two mediums is zero. sin i sin r = μ ∵ i = 0 = > sin i = 0 sin r = sin i μ = > sin r = 0 = > r = 0 We see angle of refraction also becomes 0 .