RUSSELL KIGHTLEY / SCIENCE PHOTO LIBRARY RUSSELL KIGHTLEY / SCIENCE PHOTO LIBRARY
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Parabolic mirror reflecting light. Computer illustration showing beams of light converging as they are reflected by a parabolic mirror. Parabolic reflectors such as mirrors cause reflected waves (in this case light) to converge to a point. They are often used to collect energy such as light, sound or radio waves and focus them to a point, as in satellite dishes.
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