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Q.

How many colors are present in the rainbow?


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a

3

b

4

c

7

d

5 

answer is C.

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Detailed Solution

Concept: The phenomenon of splitting white light into its constituent colors is known as the dispersion of light.
A rainbow is formed because of the dispersion of light. The white light gives out the combination of seven colors known as VIBGYOR that is Violet, Indigo, Blue, Green, Yellow, Orange and Red.
Every color has its own specific wavelength and spectrum. The combination of all the seven colors is visible to human eyes because of the spectrum of white light and hence, we call it a rainbow.
Hence, the correct option is 3.
 
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