(b) Fig. 2.1 shows a plane boundary between air and glass. A ray of light, passing from glass to air, is incident on the boundary at O. The angle of incidence is i.
(i) The critical angle for a ray passing from glass to air is 40.5°. Calculate the refractive index of the glass.​

b Fig 21 shows a plane boundary between air and glass A ray of light passing from glass to air is incident on the boundary at O The angle of incidence is ii The class=


Answer :