Physics, asked by camron62, 1 year ago

Why are mirrors used in searchlights parabolic and not concave spherical?

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Answered by HarshMalhotra

1

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Answered by ronitshritav122

0

Answer:Why are mirrors used in search lights parabolic & not concave spherical ? Sol. ... Due to large aperture of mirror , marginal rays give a divergent beam . But in case of parabolic mirror , when source is at the focus , beam of light produced over the entire cross-section of the mirror is a parallel beam .

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