Why does sky appear blue?

Short/Brief Note

Blue colour of sky is due to scattering of sunlight by molecules of the atmosphere (eg. N₂, O₂)
‘λ’_b is smaller hence it scattered more strongly based on Rayleigh Scattering law.
Hence sky appears blue.

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Chapter 6: Ray Optics - Evaluation [Page 49]

Chapter 6 Ray Optics
Evaluation | Q 28. | Page 49

What is prism?

What is Rayleigh’s scattering?

What is the reason for reddish appearance of sky during sunset and sunrise?

Derive the equation for an angle of deviation produced by a prism and thus obtain the equation for the refractive index of the material of the prism.

Obtain the equation for dispersive power of a medium

Which of the following is not a prism?

Square prism is also called a ______.

Rectangular prism is also called a ______.

Pentagonal prism has 5 pentagons.

Draw a figure that represents your mathematics textbook. What is the name of this figure? Is it a prism?