D.<span>Wave 3 resulted from constructive interference, and Wave 4 resulted from destructive interference.
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Newton's first and second laws of motion both do, but I think the one you're looking for is: <em>The First Law of Motion</em>. That description is a little more direct.
It says that if an object is not acted on by a net external force, then it continues in "constant, uniform motion".
A. Using a combination lens made up of lenses, each of which has a different index of refraction. Is the correct answer.