Question

Two different glasses - glass A and glass B - are separated by a planar boundary as shown in the figure. 9 glass A glags B 8 7 6 y (cm) 5 4 3 2 2 3 4 5 6 7 8 9 x (cm) A light ray - shown in the lower left part of the figure - approaches and then hits the boundary. Part of the ray reflects back to glass A, part of the ray enters glass B. The index of refraction of glass A is na = 1.172. Determine the index of refraction of glass B. (Notice that the lines representing the light rays travel through grid intersection points.) 1.5721 Incorrect. Tries 2/12 Previous Tries Submit Answer

Answer 1

Here,

sin i = 2 / √20

= 1 / √5

Sin r = 1 / √17

sin i / sin r = n_{​​​​​​B} / n_{​​​​​​A}

n_{​​​​​​B} = 2.161

The refractive index of glass B is 2.161.