Why is the sky blue in the day and black at night?
Answer :
During the day (daylight) the sky has a blue appearance because the Sun’s light (white light) is made up of rainbow of colors (red, orange, yellow, green, blue, indigo and violet) of different wavelength. This means, all these different colors of light combine to give you what is called white light (see diagram: refraction of sunlight).
The black sky at night that shows you the moon, planets and stars is due to the absence of the Sun’s light.
About Er. Bharat Rawal
[Total 52 posts.]I am Project Engineer in Movetech Engineers Pvt. Ltd. on the Project of Saint Gobain Glass India Ltd. I have completed B.Tech. in Electronics Instrumentation & Control Engineering (74.06% with Honours) from IET, MIA, Alwar afflicated by RTU, KOTA & AICTE. My aim is to get higher reputed job of Class A & Class B, but, I also want to give 100% effort to all students who have dreams like me. You all contact to me on Google+ on "Bharat Rawal" or follow me on Twitter at "Bharu@3" .You may know about Admin here
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