Question

Why does the sky appear blue?

• A. The color of water is reflected on the sky
• B. Fine particles in the atmosphere scatter light of shorter wavelength
• C. The water molecules in the atmosphere makes the sky appear blue
• D. None of these

Answer 1

The correct option is B Fine particles in the atmosphere scatter light of shorter wavelength

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. This scattered blue light enters our eyes and makes the ocean and sky appear blue.