Here's why:
* Refraction is the bending of light (or any wave) as it passes from one medium to another. This happens because the speed of light changes when it enters a medium with a different density.
* Speed of light: Light travels at different speeds in different mediums. For example, light travels slower in water than in air.
* Direction change: The change in speed causes the light to bend, changing its direction.
Example:
Imagine a straw in a glass of water. The straw appears bent at the water's surface because the light from the straw is refracted as it passes from the water (a denser medium) to the air (a less dense medium). This change in direction makes the straw look bent, but the straw itself is not moving faster or slower.
In summary:
Refraction changes the direction of light due to the change in its speed when it enters a different medium. The object itself (like the straw) does not change speed.
