What does the Law of Refraction state about light behavior?

The Law of Refraction, often summarized by Snell's Law, states that when light passes from one medium to another, it changes direction due to a change in its speed. In the context of the second medium having a slower speed of light, the behavior of the light is that it bends toward the perpendicular to the surface at the point of entry. This occurs because the light waves slow down as they enter a denser medium, which causes the angle of refraction to be less than the angle of incidence. In simpler terms, when light travels from a less dense medium (such as air) into a denser medium (like water or glass), it slows down and bends toward the normal line that is perpendicular to the boundary surface.

The other options do not accurately describe the behavior of light concerning the law of refraction. For instance, if light were to always bend away from the perpendicular in all mediums, it would contradict the known behavior observed in practice as light travels from air to glass or water. Similarly, claiming that light does not change direction across different densities ignores the fundamental principle of how refraction operates. Lastly, the idea that light always travels faster in denser mediums is incorrect; in fact, light travels slower in denser materials