Transcription of LIGHT - ncert.nic.in
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LIGHT - ncert.nic.in
LIGHTLIGHTThe world is largely known throughthe senses. The sense of sightis one of the most importantsenses. Through it we see mountains,rivers, trees, plants, chairs, people andso many other things around us. We alsosee clouds, rainbows and birds flyingin the sky. At night we see the moonand the stars. You are able to see thewords and sentences printed on thispage. How is seeing made possible? What makes ThingsVisibleHave you ever thought how we seevarious objects? You may say that eyessee the objects. But, can you see anobject in the dark? It means that eyesalone cannot see any object. It is onlywhen LIGHT from an object enters oureyes that we see the object. The lightmay have been emitted by the object, ormay have been reflected by learnt in Class VII that a polishedor a shiny surface can act as a mirror.
and the comb. Draw a line making an angle of 90º to the line representing the mirror at the point where the incident ray strikes the mirr or. This line is known as the normal to the reflecting surface at that point (Fig. 16.2). The angle Table 16.1 :Angles of Incidence and Reflection S. Angle of Angle of No. Incidence (∠∠∠i) Reflection ...
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