A dark mirror is commonly used for scrying (looking into the future). A dark mirror however, is not the same as a regular mirror.
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Specifically, it is called enoptromancy. Generally, it can be called scrying.
Magnifying mirrors, make-up mirrors, telescopes
the reflecting telescope uses mirrors and lenses. The refracting telescope does not include the mirrors.
Mirrors.
we use plane mirrors in our homes everyday, like dressing table mirrors, cupboard mirrors, etc.
a kaleidoscope uses mirrors to produce images that have several lines of symmetry
the reflecting telescope uses mirrors and lenses. The refracting telescope does not include the mirrors.
5 uses of mirrors
Concave mirrors are used in reflecting telescopes, makeup mirrors, and headlights to focus light rays. Convex mirrors are used in security mirrors, wide-angle rearview mirrors in cars, and magnifying glasses to provide a wider field of view or to reduce image distortion.
Mirrors, jewelry, etc.
It is a telescope that uses lenses and mirrors.
Microscope
Allows the driver to adjust mirrors from the seating position he will be in when he uses them. Also allows him to safely adjust mirrors while driving.