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Is there any light in the Mariana Trench?
In Earth’s oceans, light from the Sun only penetrates down about 200 meters (656 feet); which makes places like the Mariana Trench (11,000 meters/36,201 feet down) very dark indeed. And that’s just in places with open water!
How does light penetrate the ocean?
When sunlight strikes the ocean, some of it reflects off the surface back into the atmosphere. The amount of energy that penetrates the surface of the water depends on the angle at which the sunlight strikes the ocean. Near the equator, the sun’s rays strike the ocean almost perpendicular to the ocean’s surface.
What is the darkest part of the ocean called?
Mariana Trench. Imagine the deepest, darkest place on Earth—an underwater trench plummeting to a depth of 35,800 feet, nearly seven miles below the ocean surface. The Mariana Trench is one of the least explored places on Earth.
What depth is ocean dark?
It is sometimes referred to as the midnight zone or the dark zone. This zone extends from 1,000 meters (3,281 feet) down to 4,000 meters (13,124 feet). Here the only visible light is that produced by the creatures themselves. The water pressure at this depth is immense, reaching 5,850 pounds per square inch.
What type of light penetrates the farthest in seawater?
Blue light
Seawater absorbs light much more strongly than air does, but visible light is made up of a rainbow of different wavelengths, each perceived by us as a different color. Blue light penetrates farther into seawater (giving the ocean its distinctive color).
How deep can light penetrate clear water?
Once it is within the water, light may be scattered or absorbed by solid particles. Most of the visible light spectrum is absorbed within 10 meters (33 feet) of the water’s surface, and almost none penetrates below 150 meters (490 feet) of water depth, even when the water is very clear.
How deep is the Mariana Trench?
It is 11,034 meters (36,201 feet) deep, which is almost 7 miles. Tell students that if you placed Mount Everest at the bottom of the Mariana Trench, the peak would still be 2,133 meters (7,000 feet) below sea level. Show students NOAA’s Mariana Trench animation.
How should students respond to the Mariana Trench?
Students’ responses should include darkness, cold, and crushing pressures. The resources are also available at the top of the page. The Mariana Trench, in the Pacific Ocean, is the deepest location on Earth. According to the Exclusive Economic Zone (EEZ), the United States has jurisdiction over the trench and its resources.
How many lumens do I need to light a 100 footcamp?
For this we’ll need 20 footcandles X 120 square feet = 2400 lumens. For the maximum foot prep level of 100 footcandles, the calculation would be 100 footcandles X 120 square feet = 12,000 lumens.
How many lumens does it take to light up a kitchen?
Now to calculate the required lumens for the kitchen we multiply the number of footcandles (let’s take the dimmest general lighting level of 20 footcandles first) by the square footage. For this we’ll need 20 footcandles X 120 square feet = 2400 lumens.