What's happening:
* Light travels at different speeds in different mediums. Light travels slower in denser mediums (like water or glass) and faster in less dense mediums (like air).
* The angle of incidence is the angle between the incoming light ray and the normal. The normal is an imaginary line perpendicular to the surface at the point where the light ray hits.
* The angle of refraction is the angle between the refracted light ray and the normal.
Why it bends away:
* When light enters a less dense medium, it speeds up.
* Since the speed changes, the direction of the light ray also changes. This change in direction is what we call refraction.
* The light ray bends away from the normal because the speed increases, and the light ray wants to travel in a straighter line.
Example:
Imagine a light ray shining from water into air. Water is denser than air, so light travels slower in water. When the light ray hits the surface of the water at an angle, it speeds up as it enters the air. This causes the light ray to bend away from the normal.
Key points:
* The amount of bending depends on the difference in density between the two mediums and the angle of incidence.
* The greater the difference in density, the more the light ray will bend.
* The larger the angle of incidence, the more the light ray will bend.
Real-world examples:
* A straw in a glass of water appears bent because of refraction.
* A rainbow is formed because of refraction of sunlight through water droplets.
Let me know if you'd like to explore any of these concepts in more detail!
