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A convex mirror or diverging mirror is a curved mirror in which the reflective surface bulges towards the light source. Convex mirrors reflect light outwards, therefore they are not used to focus light. ... The image is smaller than the object, but gets larger as the object approaches the mirror...

A concave mirror, or converging mirror, has a reflecting surface that is recessed inward (away from the incident light). Concave mirrors reflect light inward to one focal point. They are used to focus light. Diameter 38mm   Focal Length Power 222/1 ..

LO-276 - ESAW Spherical MirrorUnmounted spherical mirrors, optically worked, silvered back with protective coating.276 Concave Mirror276 Convex MirrorDiameter 50mm            Diameter 60mmFocal Length             ..