Light
Light is a form of that travels away from the source producing it at a speed of .

Laws of Reflection of Light
Law 1: The incident ray, the normal ray at the point of incidence and the ray all lie in the same plane.
Law 2: The angle of incidence is equal to to angle of (i = r).
Virtual Image
A virtual image is formed by the intersection of rays.
Such an image can never be formed on a . It can be located by the method of no parallax
Parallax
The apparent of one object relative to another due to the motion of the observer is called parallax.
The object that is from the observer always appears to move with the observer.
Real Image
A real image is an image formed by the intersection of light rays.
Such an image can be located on a or by the method of no parallax.
For a Concave Mirror...
If the object is the focus the image is and is located in front of the mirror.
If the object is or at the focus the image is and is located behind the mirror.
Light from a Distant Object
Light from any point on a distant object arrives as a beam of light.
For a Convex Mirror
The image is always and located behind the mirror.
The image is always . The nearer the object is to the mirror the bigger the image.