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Why are headlights on cars usually concave in shape?

Updated: 8/18/2019
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13y ago

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Concave-shaped headlights are able to scatter and disperse the light rays produced by the bulb inside, making the light more noticeable from a distance as it can travel further, which is exactly the function of a headlight. Convex-shaped headlights, on the other hand, converge the light rays produced, causing it to travel only a very short distance and does not serve the purpose.

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Q: Why are headlights on cars usually concave in shape?
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