Stand before a mirror and your image is formed therein,
and appears to be as far behind the glass as you are before it,
making the angle of reflection equal to that of incidence,
as before stated. The incident ray and the reflected
ray form, together, what is called the passage of reflection,
and this will therefore make the actual distance of an image
to appear as far again from the eye as it really is.
Any object which reflects light is called a radiant.
The point behind a reflecting surface, from which they appear
to diverge, is called the virtual focus.

Rays of light being reflected at the same angle at which they
fall upon a mirror, two persons can stand in such a position
that each can see the image of the other without seeing his own.
Again; you may see your whole figure in a mirror half your length,
but if you stand before one a few inches shorter the whole cannot
be reflected, as the incident ray which passes from your feet into
the mirror in the former case, will in the latter fall under it.
Images are always reversed in mirrors.

Convex mirrors reflect light from a rounded surface and disperse
the rays in every direction, causing parallel rays to diverge,
diverging rays to diverge more, and converging rays to converge less--
They represent objects smaller than they really are--because the angle
formed by the reflected ray is rendered more acute by a convex than
by a plane surface, and it is the diminishing of the visual angle,
by causing rays of light to be farther extended before they meet
in a point, which produces the image of convex mirrors. The greater
the convexity of a mirror, the more will the images of the objects
be diminished, and the nearer will they appear to the surface.