Why is the sky blue? knowledge test
Why is the sky blue?
Earth's atmosphere contains a small gas molecules and particles (grains) dust. Sunlight enters the atmosphere met with gas molecules and dust particles before. Color of light has a wave length of light is more like red and yellow, can pass through and penetrate the molecular gas and dust earlier. But the color blue has a shorter light waves reflected back to the atmosphere. That is why the sky looks blue. The same principle applies also to the water in the sea or a lake that looks blue
Why is the sky blue?
Earth's atmosphere contains a small gas molecules and particles (grains) dust. Sunlight enters the atmosphere met with gas molecules and dust particles before. Color of light has a wave length of light is more like red and yellow, can pass through and penetrate the molecular gas and dust earlier. But the color blue has a shorter light waves reflected back to the atmosphere. That is why the sky looks blue. The same principle applies also to the water in the sea or a lake that looks blue
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