Reflection:
- Light reflection is the process where light rays bounce off a surface.
- The angle of incidence is equal to the angle of reflection.
- Smooth surfaces reflect light in a regular manner, creating clear images.
- Rough surfaces scatter light in various directions, causing diffuse reflection.

Refraction:
- Light refraction is the bending of light rays as they pass from one medium to another.
- Refraction occurs due to the change in speed of light in different mediums.
- The bending of light depends on the refractive index of the materials involved.
- When light passes from a rarer medium to a denser medium, it bends towards the normal.
- When light passes from a denser medium to a rarer medium, it bends away from the normal.

Important Points:
- Reflection and refraction are essential phenomena in understanding how light behaves.
- They play a crucial role in optical devices like mirrors, lenses, and prisms.
- Understanding reflection and refraction helps in explaining the formation of images in mirrors and lenses.
- These concepts are also used in various applications such as cameras, microscopes, and telescopes.
- The study of reflection and refraction is fundamental in the field of optics and has practical implications in everyday life.