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Why does the sky change colour during sunrise & sunset?
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Mar 9, 2019 · Blue light travels fast, so it scatters more often than most other colors. That's why we don't see the bright colors of the sunset during the day! So much blue light is scattered that it hides most other colors.
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Jul 18, 2018 · The Sun is low on the horizon at sunrise and sunset. At these times of the day, sunlight has had to travel through more of the atmosphere to reach us. When light hits the atmosphere it is scattered, particularly when dust, smoke and other particles are in the air.
- Blue Sky - Red Sunset Materials
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You only need a few simple materials for this weather project: 1. Water 2. Milk 3. Transparent container with flat parallel sides 4. Flashlight or cell phone light A small rectangular aquarium works well for this experiment. Try a 2-1/2-gallon or 5-gallon tank. Any other square or rectangular clear glass or plastic container will work.
Fill the container with about 3/4 full of water. Turn on the flashlight and hold it flat against the side of the container. You probably won't be able to see the beam of the flashlight, although yo...Add about 1/4 cup of milk (for a 2-1/2 gallon container—increase the amount of milk for a larger container). Stir the milk into the container to mix it with water. Now, if you shine the flashlight...Stir more milk into the water. As you increase the number of particles in the water, the light from the flashlight is more strongly scattered. The beam appears even bluer, while the path of the bea...Light travels in a straight line until it encounters particles, which deflect or scatter it. In pure air or water, you can't see a beam of light and it travels along a straight path. When there are particles in the air or water, like dust, ash, ice, or water droplets, light is scattered by the edges of the particles. Milk is a colloid, which contai...
Smith, Glenn S. (2005). "Human color vision and the unsaturated blue color of the daytime sky". American Journal of Physics. 73 (7): 590–97. doi:10.1119/1.1858479Young, Andrew T. (1981). "Rayleigh scattering". Applied Optics. 20 (4): 533–5. doi:10.1364/AO.20.000533- Anne Marie Helmenstine, Ph.D.
6 days ago · Sunlight reaches Earth's atmosphere and is scattered in all directions by all the gases and particles in the air. Blue light is scattered more than the other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time.
When the Sun is low in the sky during sunrise and sunset, the light has to travel further through the Earth’s atmosphere. We don’t see the blue light because it gets scattered away, but the red light isn’t scattered very much – so the sky appears red.
So at sunrise and sunset, when the sunlight travels a long path through the atmosphere to reach our eyes, the blue light has been mostly removed, leaving mostly red and yellow light remaining. The result is that the sunlight takes on an orange or red cast, which we can see reflected from clouds or other objects as a colorful sunset (or sunrise).
The sky appears blue to the human eye as the short waves of blue light are scattered more than the other colours in the spectrum, making the blue light more visible. To understand why...
