Light absorption in the sea reduces the amount of visible light rapidly with depth. The colors that you can see beneath the sea depend on the wavelength of light available to illuminate an object. Also, the intensity of this light decreases rapidly with water depth, for example.
The food we eat ultimately comes from plants, either directly or indirectly. The importance of plants as the global kitchen can never be underestimated. A molecule, chlorophyll Chlis crucial for this process, since it absorbs sunlight.
The single most important factor in distinguishing vertical subdivisions of the benthic and pelagic realms is the availability of solar energy. Sunlight obviously cannot penetrate beyond a certain depth in the ocean. Some organisms have, however, evolved to cope with the absence of sunlight at great depths.
The given layout depicts the information about penetration of light into the four different zones of ocean at different temperature Celsius at the depth of metre from the surface of ocean. It is a clear and coherent representation. It can be seen, that light is coming from the sky and falling on the surface of ocean in zig zag trend.
Visible radiation, or light, from the Sun is important to the world's ocean systems for several reasons. It provides the energy necessary for ocean currents and wind-driven waves. Conversion of some of that energy into heat helps form the thin layer of warm water near the ocean's surface that supports the majority of marine life.
Research article 03 Sep The response of albedo and light penetration depth e -folding depth to increasing mass ratio of black carbon is shown to depend on the snow and sea ice type and the thickness of the snow or sea ice. The snow and sea ice types are effectively defined by a scattering cross-section, density and asymmetry parameter.
The deep sea or deep layer  is the lowest layer in the oceanexisting below the thermocline and above the seabedat a depth of fathoms m or more. Little or no light penetrates this part of the ocean, and most of the organisms that live there rely for subsistence on falling organic matter produced in the photic zone. For this reason, scientists once assumed that life would be sparse in the deep ocean, but virtually every probe has revealed that, on the contrary, life is abundant in the deep ocean.