To investigate the reflection of light by different types of surface, and the refraction of light by different substances. Remove the block. Join the crosses to show the paths of the light rays ...

The change in direction of a beam of light as it travels from one material to another is called refraction. The normal is a construction line drawn at right angles to the surface of the glass block.

Ray explains the origins of light, its crucial role in visibility, and how it interacts with various surfaces through reflection and refraction. The film covers topics such as the speed of light ...