What is a shadow? Give a reason for its formation.
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♡♡♡ When light falls on an opaque object, light is obstructed and a dark patch on a screen kept behind is called a shadow. this is because light peopagates in straight line, if the distance between the objects and screen is less, the shadow will be (umbra) dark and smaller. ♡♡♡♡
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Answer:Shadow : When light falls on an opaque object light is obstructed and a dark patch on a screen kept behind is called shadow. This is because light propagates in straight line. If distance between object and screen is less the shad o w will be umbra dark and smaller.
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