Light is a form of energy which makes us visible to see the objects .
Speed of light in air is 3,00,000 km /hr.
There are two types of mirror
1. Concave mirror :- the mirror which have it's reflecting...
There are several differences between a physical and chemical change in matter or substances.
A physical change in a substance doesn't change what the substance is. In a chemical change where there is...
What is Wind Power
Wind power is the kinetic energy of wind, harnessed and redirected to perform a task mechanically or to generate electrical power.
Sailing and similar activities are among...