What happens to a ray of light as it passes from glass into air?

When a ray of light travels from a denser medium, like glass, into a less dense medium, such as air, it bends away from the normal line. The normal line is an imaginary line that is perpendicular to the surface at the point where the light ray strikes. This behavior occurs due to the change in speed of light in different media.

In glass, light travels more slowly than it does in air. As light exits the glass and enters the air, it speeds up, which causes the angle of the light ray to increase relative to the normal line. This bending away from the normal is a fundamental principle described by Snell's Law, which governs the refraction of light.