Question

12. The refractive index of air with respect to glass is
expressed as a
(a) Write down a similar expression for refractive index of glass to air , in terms
of the angles i and r.
(b) If angle r = 90°, what is the corresponding
angle i called ?

(C) what is the physical significance of the angle I in part (b) ??​

Answer 1

Answer:

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Answer 2

Answer:

(a)aμg= sinr/sini

(b) If refractive angle, r=90°, the corresponding angle of incidence, i will be equal to critical angle.

(c) If the angle of incidence exceeds the value of i obtained in part (b) (i.e, critical angle), total internal reflection will occur.