Please tell me that can it be the sign of diffraction? I mean can diffracted rays make this pattern? enter image description here

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    $\begingroup$ That looks to me like the circle you get when reflecting a laser off a wire. While there is some diffraction in the fine structure (it's almost impossible to avoid some interference when firing lasers around) the circular shape is due to reflection not diffration. $\endgroup$ – John Rennie Jun 5 '15 at 10:09
  • $\begingroup$ The finer structures visible in, and especially around the ring, could partially be speckle patterns (and therefore are a result of diffraction). $\endgroup$ – Sebastian Riese Jun 5 '15 at 11:15
  • $\begingroup$ Hello John Rennie. Sir, it seems you haved worked on this project ( circle of light by aiming a laser to a wire ). if you have worked, i would be happy to have your E-mail to discuss about this phenomenon. can you give me your E-mail? $\endgroup$ – David 2000 Jun 5 '15 at 12:51

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