Would shadow form if light did not travel in straight lines?
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No shadows would not form if light did not travel in straight lines
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The way to learn that light travels in a straight line is to view a candle light or any other object through a straight tube and then through a bent tube .For this ,we make use of a simple sip-straw or a metal tube . you will be able to see the candle light or the object on the other side of the straight tube but not through the bent tube .This shows that light travels along a straight line.
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