The mirror used in the headlights of vehicles is __________.
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a plane mirror
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a concave mirror
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a convex mirror
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a parabolic mirror
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none of these
D
Correct answer
Explanation
Parabolic mirrors are used in car headlights to concentrate and focus the light in one direction. Without these mirrors, one would either waste the indirect light or the light would shine in all directions, which would blind the driver.