Answer to Question #81904 in Optics for Becky

Question

A ray of light strikes a surface of glass at an incident angle of 60o
with the normal. Calculate the angle of refraction in the glass.
The refractive index of the glass is 1.5. (Assume that the incident
ray is in air.)

Answer 1

According to the law of refraction

sin⁡i/sin⁡r =n_2/n_1 → sin⁡i/sin⁡r =n_2 → sin⁡〖60°〗/sin⁡r =1.5 → sin⁡r=sin⁡〖60°〗/1.5=0.577 → r≈35°.