THE LIGHT
Nature has provided us five important sense organs. The sense of 'sight' enables us to see a verity of objects in the world around us. However, we cannot see anything in dark. During the day, the sunlight and at the artificial light helps us to see objects. when light falls on an object, it is reflected from the surface of the object. This reflected light when received by our eyes, enables us to see things. " light is electromagnetic rediation of a wavelenght that is visible to human eye (in the range from about 380-400 nm to about 760-780 nm). light can travel through a vacuum. In vacuum and air the speed of light is 3 lakh km/sec
sources of light which emit light by themselves are called " Luminous bodies ". The sun, hot filament of the electric bulb, candle flame, etc. are some examples of luminous bodies
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