A ray of light passes from air to water to glass to air. ...
A ray of light passes from air to water to glass to air. Given that the refractive index for light passing from air to water is 43 and air to glass is 32, calculate the refractive index of glass relative to water
0.50
0.67
0.75
1.13
Correct answer is D
gηw=gηaaηw
= 32×143
= 32×34
= 98
= 1.125
= 1.13 (to 2 d.p)