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Which colour of the light has the longest wavelength? (1) Red (2) Blue (3) Green (4) Violet

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Which colour of the light has the longest wavelength?  

(1) Red  

(2) Blue  

(3) Green  

(4) Violet

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1 Answer

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The correct option is (1) Red.

Explanation:

There are seven basic colours in the normal light spectrum.  And the wavelength of those seven colours are completely different from each other.

The colour that have the longest wavelength is red.

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