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Oct 30, 2024 · Bioluminescence is the ability of organisms to produce light with a chemical reaction. In some cases, organisms appear to produce light but the light actual originates with symbiotic bacteria. Bioluminescence can be used as camouflage, to lure prey, to signal other members of the same species or in the mimicry of other animals.
Nov 11, 2024 · Light in the ocean travels at a velocity equal to the velocity of light in a vacuum divided by the index of refraction \((n)\), which is typically \(n = 1.33\). Hence the velocity in water is about \(2.25 \times 10^{8}\) m/s. Because light travels slower in water than in air, some light is reflected at the sea surface.
Light attenuation also happens as light penetrates the ocean. Similar to the atmosphere, light attenuation in the ocean is dependent on the concentration of "stuff" in the water. For example, light can shine all the water to the bottom of clear Caribbean waters, whereas you can barely see your hand beneath the surface in muddy river waters ...
Some sources of light emit light without getting hot. These can be both living and non living things. Fluorescent tubes, glow-in-the-dark paints, glow-in-the-dark signs, glow-in-the-dark stickers and sticks, glow-worms, fireflies, jellyfish are some of the examples for light sources that emit light without getting hot.
Water is very effective at absorbing incoming light, so the amount of light penetrating the ocean declines rapidly (is attenuated) with depth (Figure 6.5.2). At 1 m depth, only 45% of the solar energy that falls on the ocean surface remains. At 10 m depth only 16% of the light is still present, and only 1% of the original light is left at 100 m ...
Artificial Light Sources: Apart from natural sources, light can be produced artificially too. The different light sources produced artificially can be put under three broad categories-. Incandescent Sources: When certain objects are heated to a high temperature, they begin to emit light. Both infrared and visible light is produced in the process.
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Light Under Ocean Waves. Sunlight contains all of the colors of our visible spectrum— red, orange, yellow, green, blue, and violet (ROYGBV). When all of these colors are combined together, they appear white as white light. Each visible color has its own wavelength, or distance between two waves. Red light has the longest wavelength in the ...
