Experiment how to show light travels in a straight line
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the experiment is
In the first example, the presenter arranges three pieces of card, with holes in, in an uneven line. The light stops and cannot travel through all three cards.
In the first example, the presenter arranges three pieces of card, with holes in, in an uneven line. The light stops and cannot travel through all three cards.
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Take the three cardboard. Place one on top of another and take a thick nail and make a hole in the centre. Erect the cardboard on the table in a straight line. Place a lighted candle in a straight line. Now, the candle is visible. This shows the light travel in a straight line.
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