The sky appears blue due to:

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Reflection of light

Dispersion and scattering of light

Total internal reflection of light

Blue colour of water droplets

answer is B.

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Detailed Solution

Concept- Recall the fundamentals of the principles of light dispersion and light scattering.
Relate light scattering and dispersion to the wavelengths of the many hues in the sun's white
light. As a result, explain why the sky is blue rather than any other hue in white light.
When white light from the sun enters the Earth's atmosphere, it is divided into its constituent
hues of violet, indigo, blue, green, yellow, orange, and red by water droplets in the
atmosphere, which functions as a prism.
However, the red, orange, yellow, and green hues of light do not truly separate into separate
colours; rather, they remain blended together as white light.
However, owing of their similar sizes to the light's wavelength, gas and dust particles in the
The atmosphere scatters the blue hue of light the most due to its shorter wavelength.
As a result of light dispersion and scattering, the sky appears blue.
Hence, the correct option is 2.

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