a)Sneha places a candle in front of three cardboards each with a hole on them and observes on the other side. What inference does she make from the given experiment? and she has changed the position of second cardboard and observes on the other side. What inference does she make the given experiment.?
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she is able to observe the candle as the holes in the pieces of cardboard are in a straight line. Light rays always travel in a straight line. He is able to see the candle due to rectilinear propagation of light. but if she change the carboard little up then the candle is blocked so by this we understand that light travels in a straight line …
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