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CBSE Class 12-science Answered

Why are mirrors used in search lights parabolic and not concave spherical?
Asked by TANUSHEKHA Agnihottri | 14 Oct, 2012, 08:14: PM
Expert Answer
it is because the spherical mirrrors do not make the light coming from a sorce at their center completely parallel if the source is not exactly at the center.l While it is not so in the case of a parabolic mirror.
Answered by | 15 Oct, 2012, 01:20: AM
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