theta_i = theta_r
This means that the angle at which the light ray strikes the mirror (the angle of incidence) is equal to the angle at which it is reflected from the mirror (the angle of reflection). This relationship is a fundamental property of plane mirrors and is essential for understanding how light interacts with them.
The reflection of light from a plane mirror is governed by the laws of reflection, which state that:
- The incident ray, the reflected ray, and the normal to the surface at the point of incidence all lie in the same plane.
- The angle of incidence is equal to the angle of reflection.
These laws can be used to predict the direction in which a light ray will be reflected from a plane mirror, given the direction of the incident ray and the orientation of the mirror.
