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2 answers

there are different ways to make lasers. Handheld lasers are dry lasers. The different color is determined by the dry material used in the laser.

2007-01-07 09:33:19 · answer #1 · answered by jpferrierjr 4 · 0 0

Using different frequency light.

2007-01-07 09:30:10 · answer #2 · answered by Anonymous · 0 0

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