notes 5

The ray of light approaching the mirror is known as the incident ray.

The ray of light that leaves the mirror is known as the reflected ray

A concave lens curves inwards. It is a diverging lens, meaning that it spreads out light rays that have been refracted through it.

A convex lens is thicker at its center than at its edges, and is used to correct short-sightedness (myopia)

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A concave mirror is shaped like the inside of a bowl. Concave mirrors are used behind car headlights and in amusements parks.

A convex mirror is a curved mirror in which the reflective surface bulges out towards the light source. Convex mirrors allow for a greater field of view.