Question

2 In the figure shown below, a meter stick of mass
Mis supported in a horizontal position by two light
strings attached at points A and B of the rod.
The initial angular acceleration of the stick if one
of the strings is cut, is (Take g = 10 m/s
[NCERT Pg. 178]
cz
B
А​

Answer 1

During the sunrise the sun is set close to the Earth's horizon, and therefore light travels a longer distance through the atmosphere of the Earth.

This is the reason sun appear reddish early in the morning. The astronaut will not observe this phenomenon on the moon's surface, because the moon has no atmosphere.