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I'm working on a project that refers to optics. the question says when a laser beam is aimed to a wire ( perpendicular to the surface ), a circle of light then will be seen on a the surface. I somehow know its explanation, but now I'm investigating it. I want to know the effect of the angle between laser beam and the wire on the circle features like its circumference, ...

enter image description hereThanks in advance.

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    $\begingroup$ Related (perhaps duplicates): Why does a circle of light appear when I shine a laser pointer at a wire and Laser, wire, and a circle of light. $\endgroup$ – Chris Mueller Mar 23 '15 at 12:34
  • $\begingroup$ Chris Mueller they have asked for the explanation but I've asked the effect of the angle between laser beam and the wire on the circle features such as its circumference $\endgroup$ – David 2000 Mar 23 '15 at 14:42
  • $\begingroup$ No One can answer my question, really?!?!?!?!??!?!?!/1 $\endgroup$ – David 2000 Mar 26 '15 at 15:54
  • $\begingroup$ I think the problem is that no one wants to take the time to. I think you are perfectly capable of answering it yourself though. Start by thinking of the wire as a flat mirror; how far from the wire would the spot land? How is this distance related to the radius of the circle of light? $\endgroup$ – Chris Mueller Mar 26 '15 at 16:02

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