When light passes from a medium with a high index of refraction into a medium with a lower index of refraction, it bends away from the normal.

Here's a breakdown:

* Index of refraction: This value represents how much light slows down when it enters a medium. Higher index means the light slows down more.

* Normal: This is an imaginary line perpendicular to the surface separating the two media at the point where the light ray hits.

Think of it like this: Imagine a car driving on a smooth surface and then suddenly hitting a patch of loose sand. The car will slow down and change direction, turning away from the smooth surface. Similarly, light slows down and bends away from the direction it was traveling in when it goes from a denser to a less dense medium.