The water smooth surface always attracted a look of the person. Beauty of the seas and oceans, rivers and lakes was sung by poets and prose writers, artists and photographers tried to imprint. On clear sunny day the blue of the sea is pleasing to the eye – whether but many know why water blue?
The poured in a glass, clear water looks absolutely colourless. Why the river or sea smooth surface seems to us blue? Before answering this question, it is necessary to set another – why objects of the world around seem in different flowers? Why foliage green, fly agaric hat red, orange orange? The reason is in ability of objects to absorb and reflect light. And even more precisely, light waves with a certain length. From a school course of physics you know that light can be spread out by means of a prism to color components. The rainbow is an example of decomposition of sunlight too. As the chemical composition of elements of the world surrounding us is various, they differently absorb and reflect light waves of various length. The subject absorbing all beams will look a black spot. If any beams are reflected, then color of a subject will be defined by these reflected beams. Green foliage because most reflects green part of a solar range. Now we will return to a question of blue of water. Blue color of water – the complex phenomenon. You for certain paid attention that water in the river or the sea happens different color, at the same time its color substantially depends on weather. If the sky gloomy, then and the sea gray, unfriendly, all its blue leaves somewhere. To the contrary, on cloudless sunny day it blue or blue, very beautiful. Water in such day seems blue or blue because its color considerably depends on color of the sky. The blue sky therefore water most reflects this color. But as water transparent, laws of absorption and dispersion of light in this environment also have a great influence on its color. Blue and blue beams dissipate some of the first, get green and yellow more deeply. The last, before approach of complete darkness, with increase in depth orange and red beams disappear. For this reason the pure top layer on sunny day has bluish color, it is especially well visible in the ocean.