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Question

Instead of all 7 colours (violet, indigo, blue, green, yellow, orange, red) if the sun only emits green, yellow, orange and red, what would be the possible colour of the sky?

A
Blue
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B
Red
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C
Green
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D
Black
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Solution

The correct option is C Green
We know that lower wavelength of light scatters more in the atmosphere. We see the sky bluish because among all seven colours the wavelengths of blue and violet are minimum. Thus blue and violet scatter more and hence, we see the sky blue.


Now instead of seven colours if the sun only emits red, green, yellow, orange lights then the wavelength of green and yellow would be minimum. Thus, the colour of the sky would be greenish or green mixed with yellow.

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