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Mirrors and Lenses
Properties of mirrors and lenses
Term | Definition |
---|---|
virtual image | an image from which light rays appear to diverge even though they are not actually focused there, a virtual image cannot be projected on a screen |
real image | an image that is formed by the intersection of light rays: a real image can be projected on a screen |
concave | curved or rounded inward like the inside of a spoon |
convex | curved or rounded outward like the back of a spoon |
converge | to come together; a converging lens or mirror causes parallel beams of light to come together at a single point |
lens | a transparent object that refracts light waves such that they converge or diverge to create an image |
diverge | to move apart; a diverging lens or mirror causes parallel beams of light to spread apart as if they came from a single point |
refraction | the bending of a wave front as the wave front passes between two substances in which the speed of the wave differs |
absorption | in optics, the transfer of light energy to particles of matter |