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 due to the change in speed of the wave as it enters the new medium.
* Medium refers to the substance through which the wave travels. Examples of mediums include air, water, glass, and even a vacuum.
* Angle of incidence is the angle between the incoming wave and the normal (an imaginary line perpendicular to the surface of the medium).
* Angle of refraction is the angle between the refracted wave and the normal.
Why does refraction occur?
When a wave enters a new medium, its speed changes. This change in speed causes the wave to bend, changing its direction. The amount of bending depends on:
* The angle of incidence: The greater the angle, the more the wave will bend.
* The properties of the two mediums: The greater the difference in speed between the two mediums, the more the wave will bend.
Examples of refraction:
* A straw appears bent when placed in a glass of water.
* Light bends as it enters a prism, causing it to separate into different colors.
* Sound waves bend as they travel from air into water, which is why you can hear sounds underwater.
In summary, refraction is the bending of waves as they pass from one medium to another due to the change in their speed.
