From below given colors, which colour is not present in 7 colours of rainbow?

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Violet

Purple

Green

Indigo

answer is B.

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Detailed Solution

Purple is not present in 7 colours of rainbow.
Red deviates the least while violet deviates the most. The light of all colors travels at the same speed in a vacuum when the white light is incident on a prism, the different colors of light get refracted or deviated at different angles. This is due to the fact that they move at different speeds inside the prism.

The correct statement would be light splits into the seven colors and the band of these colors is known as Spectrum. These seven colors are violet, indigo, blue green, yellow, orange, and red which is known as (VIBGYOR). It was first shown by Newton that light is composed of seven different colours.

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