what was Ray's problem
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An example of a ray is a sun ray in space; the sun is the endpoint, and the ray of light continues on indefinitely. In another example, a person hitting a tennis ball could cause it to travel in a ray if there were no resistance from the air; however, this can't happen on earth due to friction.Aug 4, 2015
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A ray starts at a given point and goes off in a certain direction forever, to infinity. The point where the ray starts is called (confusingly) the endpoint.
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