Question

The Refractive index of glass with respect to air is 2. Then what is the critical angle of glass air interface.

Answer 1

For critical angle , the raay will go from glass to air.

By snell's law

µgsinc = µasin90

or

sinc=µa.1/µg

according to question µg/µa =2

then

sinc = 1/2

c=sin^-1(1/2)

angle c =30°