light
Light Light is a form of energy. The main source of the light on the earth is the sun. Light is the form of electromagnetic radiation with the wavelength that can be detected by the human eye. Light is form of electromagnetic radiation that have both properties of waves and particles. Light is the source of energy and this source of energy heat the earth’s surface and its atmosphere. The study of light is called as optics. We are unable to any object in a dark room. But when light is glowing into the room, the object get visible. How it is possible ? during a day, the sunlight helps us to see the objects. Any object reflects the light, when the sunlight falls on it. This reflected light is received by our eyes. And this makes eyes to see the object. How shadow is made ? Light seems to be travel in straight line. And a source of light makes a sharp shadow of the opaque object points to this straight line path of light. I