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Questions and answers by
achintya shantanu
Questions (1)
When we project a mobile screen in front of a wall , we only see the white light but R unable to see the written matter on it
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Answers (1)
Actually to explain the energy propagated by a wave , ther is a proposed obliqiuty factor ,1+cos(theta)=q . In the case when the backward wavefront is taken the angle becomes 180degrees and as a result q= 0 , it means no energy propagation in the backward
