Here's why:
* Refraction is the bending of a wave as it passes from one medium to another. This bending is caused by a change in the wave's speed.
* Speed of light (and other waves) depends on the medium it travels through. For example, light travels faster in air than it does in water.
* When a wave enters a new medium, its speed changes, causing it to bend. The angle of bending depends on the difference in speed between the two media.
Let me know if you want to explore any of these concepts in more detail!
