Explain 10 ,11 ,12,13 Questions
12.During sunrise, the light rays coming from the Sun have to travel a greater distance in the earth's atmosphere before reaching our eyes. Therefore, the Sun appears reddish early in the morning. .
13.The sky appears blue when the scattering of light takes place. As there is no atmosphere in space and hence light does not scatter into its constituent colors that is why the sky appears dark instead of blue to an astronaut in space.
11.Planets do not twinkle because:- Planets are not a source of light. Instead, they reflect low intensity light reaching them. ... Hence, the shift is not enough for the planets to twinkle.
10.The change in intensity of light coming from the stars is called twinkling of stars. The twinkling of stars occurs due to atmospheric refraction of star's light. Hence, the star light reaching our eyes change continuously and stars appear to twinkle.
Planets are so close to earth compare to stars thats why planets do not twinkle