Please identify pictures

  • Thread starter SF
  • Start date
  • #1
I was playing with a laser pointer and a concave mirror and I managed to get a 5mm beam to spread over a 30cm area.
http://img361.imageshack.us/img361/1884/mspaintfg0.png [Broken]
http://img228.imageshack.us/img228/1866/lpuc9.jpg [Broken]
http://img228.imageshack.us/img228/3581/lp0ii9.jpg [Broken]

The irregular pattern remained stationary even when I moved the beam, so I guess it's due to (a) irregularities in the mirror or (b) impurities in the laser's lens?
 
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Answers and Replies

  • #2
Billygoat
11
0
I expect you are talking about a speckle pattern... Look up laser speckle in Wikipedia...
 

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