The lasers I work with are very small, so they wouldn’t be powerful enough to burn your hand if you put it across the beam. They would blind you in a split second if you looked at them though! My lasers are operating at a frequency that your eye can’t see, so we need special equipment to determine if the laser is turned on. The cool/scary thing about my lasers is that even though they are invisible you can still go blind from them!
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