Use Advanced Search to search by activities, standards, and more. Visible sunlight makes up about 40 percent of the total energy Earth receives from the sun. The rest of the energy Earth receives from the sun is not visible. About 50 percent is infrared energy, nine percent is ultraviolet UV energy, and one percent is X-rays or microwaves. Electromagnetic radiation is made up of electromagnetic waves that are defined by their wavelength and frequency.
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,. Indeed by to meters deep, virtually all of the solar radiation has been absorbed
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. Plants require sunlight to carry on photosynthesis , the process that converts carbon dioxide , water, and other nutrients to simple carbohydrates, providing food for themselves and for higher organisms. Below a depth of about ft m insufficient sunlight penetrates to allow photosynthesis to occur.
A glass of water reveals nothing but a transparent liquid. However, when we get to the beach on a sunny summer morning, we're blessed by a wide and visibly infinite field of blue saltwater. So, could it be that the ocean is blue because it reflects the sky?