Answers CBSE

Speed of sound

Why sound travels faster in humid air than normal air as humid air is denser than normal air? (Akash asked) Answer: The speed of sound in a medium is inversely proportional to the square root of its density. Humid air is less dense than dry air. Therefore the speed of sounf in humid air is greater than that in […]

Lecture Notes

A short introduction to Optics and the Nature of Light

INTRODUCTION LIGHT is a form of energy which causes the sensation of vision. Optics is the branch of Physics which studies the nature of light and the various phenomena associated with it. Nature of Light The nature of light was not at all thought until Newton attempted on it. Newton’s Corpuscular Theory According to Sir […]