* Change in Speed: Light travels at different speeds in different mediums. For example, light travels faster in air than it does in water. When light enters a denser medium (like water), it slows down.
* Change in Direction: Because of the change in speed, the light wave also changes direction. This change in direction is called refraction. The amount of bending depends on the angle at which the light hits the surface and the difference in the speed of light in the two mediums.
* Snell's Law: The relationship between the angle of incidence (the angle at which the light hits the surface) and the angle of refraction (the angle at which the light bends) is described by Snell's Law.
Here are some examples of refraction:
* A straw in a glass of water: The straw appears bent because the light from the straw is refracted as it passes from the water to the air.
* A rainbow: Rainbows are formed when sunlight is refracted by water droplets in the atmosphere.
* Lenses in eyeglasses: Lenses are designed to refract light in a specific way to correct vision problems.
In summary: Refraction is the bending of light waves as they pass from one medium to another. This bending is caused by the change in the speed of light as it travels through different materials.
