why the rainbow is cicle in shape ?
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Rainbows are circular because raindrops are spherical. When light from the Sun enters a raindrop it is largely reflected back inside a cone with a half-angle of 42 degrees. ... We see the shape of a rainbow as a curve because we are looking at it from a globe, and the light adjusts to the shape of the planet.
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The rainbow is curved as it reflects the round shape of the sun. ... Rainbows are circular because raindrops are spherical. When light from the Sun enters a raindrop it is largely reflected back inside a cone with a half-angle of 42 degrees
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