Why does the sky appear blue during a clear day?
AThe sky reflects the color of the ocean
BBlue light is scattered more than other colors by the atmosphere
CBlue light travels slower through air
DThe sun emits mostly blue light
Explanation
The sky appears blue due to Rayleigh scattering, in which shorter wavelengths of light, like blue, are scattered more strongly by gas molecules in the atmosphere than longer wavelengths like red. Although violet light scatters even more, human eyes are more sensitive to blue, and some violet light is absorbed high in the atmosphere. At sunset, sunlight passes through more atmosphere, scattering away blue light and letting red and orange tones dominate. Explore more Everyday Science MCQs on mcqstutor to keep practicing.
No Comments