Convex and concave lenses can both be used to correct defects of vision. The most commonly occurring defects of vision are ‘short sightedness’ and ‘long sightedness’. People who are ...

Unit 6 Segment L: Spherical Mirrors The properties of spherical mirrors are discussed.

Date Announced: 28 Oct 2014 Optical Surfaces Ltd. is a leading international supplier of concave and convex spherical mirrors made to your exact specification. A spherical mirror is a mirror which has ...

Lenses - Edexcel Convex and concave lenses Lenses are precisely shaped pieces of glass that have been developed and used in corrective glasses, telescopes, microscopes, binoculars, and magnifying ...