Question

7 Water in deep sea is blue in colour. Why?​

Answer 1

Answer:

The ocean looks blue because red, orange and yellow (long wavelength light) are absorbed more strongly by water than is blue (short wavelength light). So when white light from the sun enters the ocean, it is mostly the blue that gets returned. Same reason the sky is blue."

Answer 2

Explanation:

I think beacuse of scattering of whitecolour light present in atmosphere in blue.. and in evening it appears reddish because scattering of red light in atmosphere...