Question

why red and blue colours are predominant in spectrum

Answer 1

Hey there !

Wavelength decreases and energy increases as you move from red to violet light across the spectrum in the following order: red, orange, yellow, green, blue, and violet. As light wavelength decreases from red to blue light, so does the ability of light to penetrate water.

Hope it helps you !

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Answer 2

$same \: as \: above \:$