Grix
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- Joined
- Dec 9, 2008
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Very quick question: I've heard that the divergence of gas lasers are extremely good compared to diode lasers. Is this true?
For example, our science teacher played with a 1mW HeNe in front of the class, saying that it could project a dot about the same size on a wall 2-3 miles away.
For example, our science teacher played with a 1mW HeNe in front of the class, saying that it could project a dot about the same size on a wall 2-3 miles away.