Answers

2015-09-16T19:29:37+05:30
REFRACTION is the bending of the wave when it enters to a medium with a different speed.
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2015-09-16T20:00:09+05:30
REFRACTION- IT IS THE CHANGE IN DIRECTION  OF PROPAGATION OF A WAVE DUE TO CHANGE IN TRANSMISSION MEDIUM.
 IT EXPLAIN IN CONSERVATION OF ENERGY AND CONSERVATION OF MOMENTUM.
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