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How does refraction form a rainbow?

Updated: 8/10/2023
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13y ago

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Different wavelengths refract at different angles when they pass through an interface (the meeting surface of two different media, or objects through which light passes) according to a variation of Snell's law. Because the light encounters two interfaces - one going in, one going out of the prism - it is refracted twice. The first refraction spearates the colours initially and the second spreads them even further apart.

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14y ago
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13y ago

Going through a prism, light is decomposed into every color in it.

The sunlight shining through the droplets of moisture in the Earth's atmosphere make the spectrum of light appear in a semi-circular form.

Keep in mind that the colors you can see is only the colors that can be seen by the human eye - infra-red and infra violet will be present in a rainbow but will not be visible to us.

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10y ago

Water droplets separate the colors of sunlight, producing a rainbow.

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7y ago

Rainbows are caused by refraction of sunlight through raindrops.

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Q: How does refraction form a rainbow?
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