- published: 07 Sep 2015
- views: 10541
Red is the color at the end of the spectrum of visible light next to orange and opposite violet. Red color has a predominant light wavelength of roughly 620–740 nanometres. Red is one of the additive primary colors of visible light, along with green and blue, which in Red Green Blue (RGB) color systems are combined to create all the colors on a computer monitor or television screen. Red is also one of the subtractive primary colors, along with yellow and blue, of the RYB color space and traditional color wheel used by painters and artists.
Reds can vary in shade from very light pink to very dark maroon or burgundy; and in hue from the bright orange-red scarlet or vermilion to the bluish-red crimson.
Red was widely used in prehistoric cave art, made with red hematite or iron oxide, or red ochre. Early civilizations in China, the Middle East and Europe made red dyes from the madder plant or from a tiny insect called Kermes vermilio. Civilizations in the Americas made brilliant reds from another scale insect, the cochineal; ancient Chinese artists during the Han Dynasty used dye from the madder plant to color silk and pigments from lead oxide to color pottery.
A mountain is a large landform that stretches above the surrounding land in a limited area, usually in the form of a peak. A mountain is generally steeper than a hill. Mountains are formed through tectonic forces or volcanism. These forces can locally raise the surface of the earth. Mountains erode slowly through the action of rivers, weather conditions, and glaciers. A few mountains are isolated summits, but most occur in huge mountain ranges.
High elevations on mountains produce colder climates than at sea level. These colder climates strongly affect the ecosystems of mountains: different elevations have different plants and animals. Because of the less hospitable terrain and climate, mountains tend to be used less for agriculture and more for resource extraction and recreation, such as mountain climbing.
The highest mountain on Earth is Mount Everest in the Himalayas of Asia, whose summit is 8,850 m (29,035 ft) above mean sea level. The highest known mountain on any planet in the Solar System is Olympus Mons on Mars at 21,171 m (69,459 ft).
Red Mountains - Down With the Sun (Full Album 2015)
Red Mountains "Nomads"
Red Mountains "Sun"
Red Mountains - Sun
Sonic Adventure DX Music: Red Mountain 1
Jorane " Red Mountains "
Red Mountains - Six Hands
donkey takes a trip to the red mountains
Red Hot Skull ...for Red Mountain - Sonic Adventure Music Extended
Red Mountains - Sleepy Desert Blues