2006-08-10 13:25:57 · 10 answers · asked by Jennifer 3 in Science & Mathematics ➔ Geography
hope u find this useful.
(:
take care and good question too .
The sun's rays hit the Earth's atmosphere, where the light is scattered by nitrogen and oxygen molecules in the air. The blue wavelength of this light is affected more than the red and green wavelengths, causing the surrounding air to appear blue. At sunset, the sun's light passes farther through the atmosphere, deflecting and decreasing the blue in the air. Scattering by dust particles and pollution in the air causes the sunset to appear red. Rayleigh scattering (named after Lord Rayleigh) is the scattering of light, or other electromagnetic radiation, by particles much smaller than the wavelength of the light. It occurs when light travels in transparent solids and liquids, but is most prominently seen in gases. Rayleigh scattering of sunlight by the atmosphere is the main reason light from the sky is blue.
2006-08-12 00:57:57 · answer #1 · answered by Wide Ruled Paper 3 · 1⤊ 1⤋
A clear cloudless day-time sky is blue because molecules in the air scatter blue light from the sun more than they scatter red light. When we look towards the sun at sunset, we see red and orange colours because the blue light has been scattered out and away from the line of sight.
The white light from the sun is a mixture of all colours of the rainbow. This was demonstrated by Isaac Newton, who used a prism to separate the different colours and so form a spectrum. The colours of light are distinguished by their different wavelengths. The visible part of the spectrum ranges from red light with a wavelength of about 720 nm, to violet with a wavelength of about 380 nm, with orange, yellow, green, blue and indigo between. The three different types of colour receptors in the retina of the human eye respond most strongly to red, green and blue wavelengths, giving us our colour vision.
2006-08-12 02:42:41 · answer #2 · answered by Ashish B 4 · 0⤊ 0⤋
The sun's rays hit the Earth's atmosphere, where the light is scattered by nitrogen and oxygen molecules in the air. The blue wavelength of this light is affected more than the red and green wavelengths, causing the surrounding air to appear blue. At sunset, the sun's light passes farther through the atmosphere, deflecting and decreasing the blue in the air. Scattering by dust particles and pollution in the air causes the sunset to appear red.
2006-08-10 20:32:24 · answer #3 · answered by oklatom 7 · 1⤊ 1⤋
Rayleigh scattering (named after Lord Rayleigh) is the scattering of light, or other electromagnetic radiation, by particles much smaller than the wavelength of the light. It occurs when light travels in transparent solids and liquids, but is most prominently seen in gases. Rayleigh scattering of sunlight by the atmosphere is the main reason light from the sky is blue.
2006-08-11 08:03:08 · answer #4 · answered by Anonymous · 0⤊ 0⤋
the sky is not blue, it is just our eyes range.
2006-08-10 20:31:27 · answer #5 · answered by Anonymous · 0⤊ 1⤋
Why is the grass green? Why do flowers smell pretty? What are you 2 years old???
2006-08-10 22:30:12 · answer #6 · answered by kingofnarniaforever 4 · 0⤊ 1⤋
because light refracts off of it and makes blue show i'm pretty sure
2006-08-10 20:31:27 · answer #7 · answered by true2urself92 2 · 0⤊ 1⤋
It reflects the color of the sea
2006-08-10 20:32:15 · answer #8 · answered by Isabella 3 · 0⤊ 1⤋
coz blue is my favorite colour...
2006-08-10 20:31:03 · answer #9 · answered by hari 2 · 0⤊ 1⤋
What does THIS question have to do with GEOGRAPHY????
2006-08-11 02:08:27 · answer #10 · answered by Thomas C 4 · 0⤊ 1⤋