Sunset or sundown is the daily disappearance of the Sun below the western half of the horizon, i.e. at an azimuth greater than 180 degrees, as a result of Earth’s rotation.
The time of sunset is defined in astronomy as the moment when the trailing edge of the Sun’s disk disappears below the horizon. The ray path of light from the setting Sun is highly distorted near the horizon because of atmospheric refraction, making the sunset appear to occur when the Sun’s disk is already about one diameter below the horizon. Sunset is distinct from dusk, which is the time at which the sky becomes completely dark, which occurs when the Sun is approximately eighteen degrees below the horizon. The period between sunset and dusk is called twilight.
Locations north of the Arctic Circle and south of the Antarctic Circle experience no sunset or sunrise at least one day of the year, when the polar day or the polar night persists continuously for 24 hours.
Sunset creates unique atmospheric conditions such as the often intense orange and red colors of the Sun and the surrounding sky.
As a ray of white sunlight travels through the atmosphere to an observer, some of the colors are scattered out of the beam by air molecules and airborne particles, changing the final color of the beam the viewer sees. Because the shorter wavelength components, such as blue and green, scatter more strongly, these colors are preferentially removed from the beam.At sunset, when the path through the atmosphere is longer, the blue and green components are removed almost completely leaving the longer wavelength orange and red hues we see at those times. The remaining reddened sunlight can then be scattered by cloud droplets and other relatively large particles to light up the horizon red and orange.
Sunset , the sky along the horizon has only a dull-reddish appearance, while the rest of the sky remains mostly blue and sometimes green.
Sunset colors are typically more brilliant than sunrise colors, because the evening air contains more particles than morning air.
Ash from volcanic eruptions, trapped within the troposphere, tends to mute sunset colors, while volcanic ejecta that is instead lofted into the stratosphere (as thin clouds of tiny sulfuric acid droplets), can yield beautiful post-sunset colors called afterglows. The high altitude clouds serve to reflect strongly reddened sunlight still striking the stratosphere after sunset, down to the surface. Sometimes just after sunset a green flash can be seen.
The color sunset is a pale tint of orange. It is a representation of the average color of clouds when the sunlight from a sunset is reflected off of them.The first recorded use of sunset as a color name in English was in 1916.
I live on a lake with a long view and we get some of the most magnificent sunsets. I especially like the deep blood-red ones that happen two or three times a year.
See beautiful pictures of sunset shots in the world. Come our freefbpictures.com and see our amazing gallery. I’m sure. You will love to sunset gallery.