Answer:
c. 1.51
Explanation:
i = angle of incidence made by yellow light at air-medium interface = 45.0°
r = angle of refraction made by yellow light at air-medium interface = 28.0°
n₁ = index of refraction of air = 1
n₂ = index of refraction of medium = ?
Using Snell's law air-medium interface
n₁ Sini = n₂ Sinr
1 Sin45 = n₂ Sin28
n₂ = 1.51
So the correct choice is
c. 1.51