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The sky appears blue due to a phenomenon called Rayleigh scattering, where gas molecules in Earth's atmosphere scatter sunlight in all directions. Blue light travels in shorter, smaller waves, causing it to scatter more strongly than other colors, filling the sky. Our eyes are also more sensitive to this scattered blue light.

The sky appears blue due to a phenomenon called Rayleigh scattering, where gas molecules in Earth's atmosphere scatter sunlight in all directions. Blue light travels in shorter, smaller waves, causing it to scatter more strongly than other colors, filling the sky. Our eyes are also more sensitive to this scattered blue light.

The sky appears blue due to a phenomenon called Rayleigh scattering, where gas molecules in Earth's atmosphere scatter sunlight in all directions. Blue light travels in shorter, smaller waves, causing it to scatter more strongly than other colors, filling the sky. Our eyes are also more sensitive to this scattered blue light.