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A fishing light attractor is a fishing aid that uses lights attached to a structure above water or suspended underwater to attract fish and members of their food chain. Fish are most attracted to true-green light colors, and LEDs do the best job of illuminating this color.
A dive light is routinely used during night dives and cave dives, when there is little or no natural light, but also has a useful function during the day, as water absorbs the longer (red) wavelengths first then the yellow and green with increasing depth. By using artificial light, it is possible to view an object in full color at greater depths.
Underwater vision is the ability to see objects underwater, ... Water preferentially absorbs red light, and to a lesser extent, yellow, green and violet light, ...
Shorter wavelengths penetrate further, with blue and green light reaching the deepest depths. [6] This is why things appear blue underwater: how colours are perceived by the eye depends on the wavelengths of light that are received by the eye. An object appears red to the eye because it reflects red light and absorbs other colours.
Some Green Light Teams were trained to transport their bomb underwater if necessary. These Green Light Troops specialized in scuba and underwater missions. The United States Atomic Energy Commission , or AEC, even produced pressurized encasements for the tactical nuclear weapon to travel underwater at depths as deep as 200 feet (61 m). [ 1 ]
As blue and red light are absorbed, green light remains. Ocean regions with high concentrations of phytoplankton have shades of blue-to-green water depending on the amount and type of the phytoplankton. [15] [16] Green waters can also have a combination of phytoplankton, dissolved substances, and sediments, while still appearing green.