Reflection occurs when light bounces off objects.
If the surface is rough, the light scatters.
. If the surface is smooth, the light will bounce off it at equal angles.
Refraction occurs because light bends. Curved surfaces of a lens bends the light. A lens is transparent material. The path of light through a convex lens is directed to s ingle focal point. And a path of light through a concave lens is not directed to single focal point.
Reflection and Refraction are both behaviors of waves, like light and sound waves.