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post #31 of Old 10-15-2012
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Re: Riddles with a Prize, by Mantus Anchors

The key to this is the viewers angle to the two objects.

Object 1 and Object 2 are traveling on parallel courses. Viewer is either watching them go away or towards them so that the appear as point objects. Think of standing in the middle of a road and watch two cars slowly drive away from you. The distance that they are from each other never changes relative to your view point.


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