Page 28 - WAVES
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(c) Large Obstacle (d) Small Obstacle
The waves only curved at the edge The waves only curved at the edge
which adjacent to the barrier after which adjacent to the barrier after
passing the obstacle. The effect of passing the obstacle. The effect of
diffraction is not obvious. diffraction is obvious.
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As the size of the gap or obstacle is smaller, the effect of diffraction becomes obvious.
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