The angle of refraction of a light ray that enters the surface of a calm lake from air can be determined using Snell's Law. This law provides the relationship:
n1*sinθ1 = n2*sinθ2, where, n1 and n2 refer to the refraction index of the media, and θ1 and θ2 refer to the angle of incidence. In this case n1 (air) = 1.00029, n2 (water) = 1.333, and θ1 = 45°. Using the given values, we obtain θ2 = 32.05°.
