Why is the sky blue?
Rayleigh Scattering
The sun's light scatters in colors of the shortest wavelengths, violet and blue, when it interacts with the molecules in our atmosphere; since our eyes are more sensitive to blue, this is how we see the blue sky.
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refraction.
As the light waves enter the atmosphere the waves are bent (refracted ) by the higher density of the atmosphere.
Blue light waves have the shortest wave length so they are refracted the most. Red light waves have the longest wave length and penetrate further into the atmosphere.
What is left to observe is the higher energy short wavelength blue light in the the sky.
Refraction can be observed by placing a pencil in a glass of water at an angle. The pencil will appear to be bent as it "enters" the water.
The reason the sky is blue is the greater refraction of blue light waves.
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The sky appears blue due to Rayleigh scattering, where shorter (blue) wavelengths of sunlight are scattered more than longer (red) wavelengths by molecules in the Earth's atmosphere. This scattering causes blue light to scatter in all directions, making the sky appear blue to an observer on the ground.
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
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