The sky appears blue due to:

Correct option is A

• The correct answer is (A)scattering of light of lower wave length.
• The sky appears blue due to the scattering of light of lower wavelength: 
• Explanation: This phenomenon is called Rayleigh scattering, which occurs when particles in the atmosphere scatter electromagnetic radiation, such as light, with a shorter wavelength. 
• Why it happens: The air molecules and other fine particles in the atmosphere are smaller than the wavelength of visible light. This makes them more effective at scattering blue light, which has a shorter wavelength, than red light, which has a longer wavelength. 
• What happens to the light: When sunlight passes through the atmosphere, the blue light scatters more strongly than the red light. The scattered blue light enters our eyes, making the sky appear blue. 
• What happens at sunrise and sunset: At sunrise and sunset, more light has to travel through the Earth's atmosphere because the sun is lower in the sky. This means that red light is not lost as much, making the sky appear red.