Question

Why earth and ocean is blue (but water in colourless)​

Answer 1

as water is absorbs smthng quickly so that the light red and blue light are scattered on the oceans and sea water by which these water bodies absorbs red light quickly but they leave blue scattering light as red light has long wave length and blue light have short wave length so that it scatters on the water bodies...

here red light is the source from sunlight

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Answer 2

$\huge\bold\red{ANSWER:-}$

◆ The sky is blue because the atoms of nitrogen and oxygen scatter the blue light from the white light of the sun in all directions. The blue of the sea is not a reflection of the sky.

◆ The absorption spectrum of water has a higher absorbance at the red end of the visible spectrum so more of the blue green end of the visible range is passed through.

◆ 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."

◆ In other words, the color of the ocean and the color of the sky are related but occur independently of each other: in both cases, the preferential absorption of long-wavelength (reddish) light gives rise to the blue. Note that this effect only works if the water is very pure; if the water is full of mud, algae or other impurities, the light scattered off these impurities will overwhelm the water's natural blueness.

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