Why do we place bulb in car headlights at the focus of the concave mirror ?
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Explanation:
because when the bulb of headlight is placed at focus of concave mirror, it allows the light to spread out to infinity
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The concave mirrors used in car are called parabolic concave mirrors .like the simple concave mirrors light coming from the focus becomes parallel to the principle axis .which is beneficial creating a more focused light beam.
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