Here's why:
* Optically denser medium: This refers to a medium where light travels slower. Think of it like walking through thick mud versus walking on a smooth pavement.
* Optically rarer medium: This refers to a medium where light travels faster.
When light transitions from a slower medium to a faster medium, it changes direction. This change in direction is called refraction.
Key point: The angle of refraction is always greater than the angle of incidence in this scenario. This means the light bends away from the normal line.
Example: A ray of light passing from water (denser) to air (rarer) will bend away from the normal.
Let me know if you'd like a diagram to visualize this!
