08 May 2011

Why does earths sky appear blue and mars sky appear red?

CBSE PHYSICS
Q. Why does earths sky appear blue and mars sky appear red?
Ans: 

Mars has a much thinner atmosphere than earth, it also has a constant haze of dust in the air that contains a brown iron oxide called limonite, which absorbs blue light and scatters the other wavelenghts of visible light

Q.Why is the earth's orbit elliptical?Ans:
The laws of motion turn out that this is the way the universe functions with gravity pulling planets in to the Sun and inertia keeping them in orbit.




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