Question

During day time sky is seen in blue color due to the scattering of light. Light reaching in a room is also scattered light. But no blue color is seen. Why?

Answer 1

Explanation:

1. The color is not observed in the room is not due to the absence of a different refractive index. Due to the presence of the water droplets in the room whose size is large as compared to the air molecules. Thus, it scattered all the color waves of different wavelengths.
2. So scattering of light takes place when the size of the scattering object is very very small as compared to the wavelength of the light.
3. When light from the sun travels through the earth's atmosphere, the different wavelengths get scattered from their path in different amounts.
4. As the wavelength of the blue color is approximately half the wavelength of the red color, the scattering of blue light is more than red light. Due to which sky is blue in color.
5. Light reaching the room does not pass through media with a greater difference in refractive index. In the sky, there are different regions with different refractive indexes containing different gases.