Which gas is responsible for the blue color of the Earth's atmosphere?

Correct option is B

Explanation:

The blue color of the Earth's atmosphere is primarily due to Rayleigh scattering. Here's how it works:

• Sunlight is made of many colors. When it enters Earth's atmosphere, it interacts with gas molecules.
• Nitrogen (N₂) and Oxygen (O₂) are the most abundant gases and are very effective at scattering shorter wavelengths of light, like blue and violet.
• Although violet light is scattered even more, our eyes are more sensitive to blue, and some violet is absorbed by the upper atmosphere, making the sky appear blue to us.

Information Booster:

• Rayleigh scattering is more effective at shorter wavelengths.
• That's why during sunrise and sunset, when sunlight passes through more of the atmosphere, the longer wavelengths like red and orange dominate—giving the sky a reddish hue.