REFLECTION OF LIGHT

Reflection of light occurs when a light ray strikes the boundary of two media and a portion of it is turned back into the same medium. Highly polished surfaces, like mirrors, reflect most of the light falling on them.

There are two main laws of reflection: the angle of incidence is equal to the angle of reflection, and the incident ray, the normal to the mirror at the point of incidence, and the reflected ray all lie in the same plane. These laws apply to all reflecting surfaces, including spherical ones.

Reflection can be categorized into two types: regular reflection and irregular or diffused reflection. Regular reflection happens on smooth, polished surfaces like plain mirrors, while irregular reflection occurs on rough surfaces, such as a wall.

The video defines several important terms: 'incident ray' (light striking the surface), 'point of incidence' (where the ray strikes), 'reflected ray' (light after reflection), 'normal' (perpendicular to the surface at the point of incidence), 'angle of incidence' (angle between incident ray and normal, denoted by 'i'), 'angle of reflection' (angle between reflected ray and normal, denoted by 'r'), 'plane of incidence' (containing incident ray and normal), and 'plane of reflection' (containing reflected ray and normal).