Straight waves are what happens when something  moves back and forth in a medium like water. These are interesting when they hit a diagonal plane barrier, because when the incident wave reaches the barrier, the waves always reflect at the same angle that they approached the barrier with (called the Law of Reflection).
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We’ll look at how waves reflect off curved surfaces(like a parabolic mirror) when we get to our section on light waves.

Click here to go to next lesson on Wave Refraction.

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