1) Why is the colour of the clear sky is blue?
2) What is Tyndall effect? Explain with an example.
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1) Why is the colour of the clear sky is blue?
2) What is Tyndall effect? Explain with an example.
Don't spam here!!
Explaination needed!!
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Why is the colour of the clear sky blue?
$\longrightarrow$ The molecules of air and other fine particles in the atmosphere have size smaller than the wavelength of visible light. These are more effective in scattering light of shorter wavelengths at the blue end than light of longer wavelengths at the red end. When sunlight passes through the atmosphere, the fine particles in air scatter the blue colour more strongly than red. The scattered blue light enters our eyes. Since we see the blue light from everywhere overhead, the dear sky appears blue.
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What is Tyndall effect? Explain with an example.
$\longrightarrow$ The scattering of light by particles in its path is called Tyndall effect. When a beam of light enters a smoke-filled dark room through a small hole, then its path becomes visible to us. The tiny dust particles present in the air of room scatter the beam of light all around the room. Thus, scattering of light makes the particles visible. Tyndall effect can also be observed when sunlight passes through a canopy of a dense forest. Here, tiny water droplets in the mist scatter light.
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Answer:
1)Gases and particles in Earth's atmosphere scatter sunlight in all directions. Blue light is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time.
2)The Tyndall effect is scattering of light by particles in a colloid or particles in a fine suspension. It can be seen when the light passes through the colloids or turbid substances causing the light to scatter in multiple directions. Examples are: ... Light being shined through milk. As milk is a colloid