A reflecting telescope.
Concave means bulging inward - reflecting telescopes use this sort of mirror. The first telescope designed to use one was invented by Isaac Newton and they are therefore called "Newtonian" telescopes.
a concave mirror
convex mirror
Not sure about mirrors but convex and concave lenses are used to treat conditions such as long/short sightedness.
It uses a concave mirror in order for the light to be concentrated to point forward.
Astronomical telescopes use a large concave mirror, a plane mirror, and a convex lens in their design. The concave mirror gathers light, the plane mirror reflects it to a more convenient viewing location, and the convex lens magnifies and focuses the image for observation.
A reflecting telescope is different from a refracting telescope because a reflecting telescope uses a concave lens, a plane mirror, and a convex lens. While a refracting telescope uses two lens.
concave mirror shows the image real and magnified........when a dentist uses a concave mirror, he/she places the mirror such that the teeth falls on the focus of the mirror due to which the wound can be easily detected and can be treated as per its treatment
Magnifying mirrors, make-up mirrors, telescopes
A radio telescope is a reflecting telescope, and uses a mirror rather than a lens. Since radio waves are so much longer than light waves, the 'mirror' of a radio telescope is the 'dish' reflector that focuses radio waves onto its antenna, located at the prime focus of the dish.
A film artist typically uses a concave mirror when applying make-up. The reason for this is that a concave mirror produces an erect, virtual and highly magnified image.
all telescopes use a mirror.