A mirror is made out of glass.
Since light doesn't travel through a mirror, it is opaque.
On the back of a mirror is a thin layer of silver or chrome which is the reflecting surface. Behind this is backing which keeps the silver in place and keeps it from oxidizing.
mirror
A Mirror that is flat is a duplex mirror.
Its called a Convex Mirror
The focal length for a mirror is determined by the law of reflection from the mirror surface. This law is not governed by the material that the mirror is made by. This means that the focal length depends only on the radius and curvature. Conversely, the focal length of a lens depends on the indices of refraction of the lens meterial and the surrounding medium.
Convex mirror
Convex mirror
Doesn't matter the type of mirror.
It's just a normal mirror scientifically known as a "plane mirror".
Mirror roll, or mirror on a roll, is a rolled sheet of reflective material. It is usually self-adhesive on one side and can be cut and placed to create a mirror anywhere.
Cancave mirror is the type of mirror that has minimum field of view for same aperture.
The definition of "Medium" is the material that something is made of. So, a mirror can be made of any material that can be polished enough to be reflective. For example, Metal, Plastic, Glass, even Water can have mirror properties. You may wish to restate your question?
A concave mirror.