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Optics is the study of light, and its interaction with matter. It includes topics such as imaging systems, fiber optics, lasers, quantum optics, and more.

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Why rainbow doesn't happen in each drop independently?

What you see when you're viewing a rainbow at any particular point is the light from the sun reflecting off droplets at that particular point to hit your eye. The angle from which the light hits thos …
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5 votes
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Would the moon be brighter if it were completely spherical?

That depends on how literal you want to be. If the moon were perfectly spherical, but the dust on top were the same, it would be just as bright as it is now. However take that to a literal extreme …
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