A laser beam passes from air into a 25% glucose solution at an incident angle of 37 ∘ . In what direction does light travel in the glucose solution? Assume the index of refraction of air is n = 1.

Answer 1

From the reference book: the index of refraction
of 25% glucose solution is n₁=1.37
sin i/sinr=n₁/n=n₁
sinr= sin i/n₁= sin37°/1.37=0.439
r=sin⁻¹0.439=26°