Why is secondary rainbow fainter than primary rainbow?
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Both the primary and secondary rainbows are phenomena that formed by the reflection and refraction of sunlight in tiny water droplets. When a sunbeam is being refracted twice and reflected once by the droplet, a primary rainbow will form. If the beam is being refracted twice and reflected twice, a secondary rainbow will form. As the secondary rainbow is formed by one more reflection than the primary rainbow, it is much fainter and rare to see. On the other hand, since the paths of sunbeams in a primary rainbow and a secondary rainbow are different, the colors of the secondary rainbow are arranged in just the reverse order of the primary one.
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secondary rainbow fainter than primary rainbow
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secondary rainbow fainter than primary rainbow because during the formation of the secondary rainbow the refraction and the total internal reflection occurs twice which makes its intensity to reduce and whereas in primary rainbow there is refraction happening twice and only one total internal refraction so its intensity will be higher than that of the secondary rainbow
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secondary rainbow fainter than primary rainbow because during the formation of the secondary rainbow the refraction and the total internal reflection occurs twice which makes its intensity to reduce and whereas in primary rainbow there is refraction happening twice and only one total internal refraction so its intensity will be higher than that of the secondary rainbow
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