Question

The bluish colour of water in deep sea is due to
(a) the presence of algae and other plants found in water
(b) reflection of sky in water
(c) scattering of light
(d) absorption of light by the sea

NCERT Class X
Science - Exemplar Problems

Chapter_The Human Eye and
the Colourful World

Answer 1

(c) Scattering of light 

Answer 2

The bluish color of water in the deep sea is due to the scattering of light.

Option (c)

Explanation:

• The bluish color of water in the deep sea is due to scattering of white light and we know that white light or sunlight is composed of seven colors.
• When sunlight falls on the sea, the red light having the most wavelength (scatters less) are absorbed most than the blue light having less wavelength (scatters more). Thus, when sunlight falls on the sea, the sea appears blue in color.

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