* Light travels at different speeds in different mediums. Light travels fastest in a vacuum (like space). When light enters a denser medium like water, it slows down.
* The change in speed causes a change in direction. Imagine light as a car traveling on a road. If the car suddenly enters a different road surface with different friction, it will change its direction slightly. Similarly, when light enters water, its speed changes, causing it to bend.
* The angle of refraction depends on the refractive index. The refractive index of a material is a measure of how much it slows down light. Water has a higher refractive index than air, meaning light slows down more in water. This leads to a greater change in direction (refraction) when light enters water.
Here's a simple analogy:
Think of light as a wave traveling across a beach. When the wave hits the water, part of it enters the water and slows down, while the rest continues moving at the original speed on the sand. This change in speed causes the wave to bend, changing its direction.
In summary, the change in speed of light when it passes from air to water, due to the difference in refractive indices, causes the light to refract or bend.
