When light travels from air into glass it slows down because glass is more (optically) dense than air. This change in speed can cause the light to bend at the boundary between the two transparent ...

When people look into a mirror, they see an image of themselves behind the glass. That image results from light rays encountering the shiny surface and bouncing back, or reflecting, providing a ...

Electromagnetic waves are transverse waves with a wide range of properties and uses. The reflection and refraction of light explains how people see images, colour and even optical illusions. Sample ...