optics

Lateral inversion

This is the phenomenon where an object seems to be flipped or reversed in a plane mirror.

Critical angle

This is the angle of incident in a dense medium for a ray of light which will produce an angle of reflection of 90 in the less dense medium

Total internet reflection

This is a phenomenon where by rays of light travelling from a dense medium towards a less dense medium get reflected back into the dense medium when the angle of incident is greater than the critical angle.

Mirage

This is an optical illusion caused by the refraction of light in layers of air with different temperatures.