explain why a rainbow has 7 colours?
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Answer:-- A rainbow has 7 colours because water droplets break sunlight into the seven colours of the spectrum.
It is due to dispersion of light.
The white light splits into the 7 colours.
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Answer:
rainbows appear seven colours because water droplets break sunlight into the seven colours of the spectrum you get the same result when sunlight passes though a prism the rainbow effect occurs because the light is then reflected inside that droplets and finally refracted out again into the air
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