Here's a breakdown:
* Refraction is the change in direction of a wave as it passes from one medium to another. This change in direction is caused by the change in the wave's speed.
* Angle of incidence is the angle between the incoming wave and the normal line (a line perpendicular to the surface of the medium).
* Angle of refraction is the angle between the refracted wave and the normal line.
Why does refraction occur?
When a wave enters a new medium, its speed changes. This change in speed is caused by the different properties of the two media. For example, light travels slower in water than in air. The change in speed also causes the direction of the wave to change.
Key examples:
* Light: When light passes from air to water, it slows down and bends towards the normal line. This is why a straw in a glass of water appears to be bent at the surface of the water.
* Sound: Sound waves also refract. This is why you can hear someone talking from behind a wall, even though you can't see them. The sound waves bend around the wall and reach your ears.
Let me know if you would like more detail on any of these aspects!
