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When looking into safety issues and safety goggles, I read that a laser beam that hits you directly in the eye from close range might damage your eye, depending on its power, but that the same laser at a longer distance might not do damage even if it hits you square in the eye.
Thats pretty obvious, as everything loses power as it travels farther away from it's source, but how quickly or at what rate do lasers actually lose their energy?
I would imagine it would depend on how clear the room or air is, and maybe the light color frequency plays a role(?) Do different colored lasers lose energy at different rates? I'd imagine so........
If you have a 532nm green laser of 200mW, and you point it across a field 1/2 mile, on a clear night(or day), with no fog, smoke, particulates, is there some formula or equation that determines the loss of energy per meter, assuming the beam stays relatively concentrated, and doesnt spread out too much? How would that laser do compared to 200mW lasers of 405, 450, 635, 650 as far as maintaining its energy over distance?
If you accidentally hit a person in the eye, who isnt wearing safety goggles with a quality 400mW 650nm laser at 300 feet or 100 meters, would it still likely do damage if the person doesnt blink or move for a few seconds?
Thats pretty obvious, as everything loses power as it travels farther away from it's source, but how quickly or at what rate do lasers actually lose their energy?
I would imagine it would depend on how clear the room or air is, and maybe the light color frequency plays a role(?) Do different colored lasers lose energy at different rates? I'd imagine so........
If you have a 532nm green laser of 200mW, and you point it across a field 1/2 mile, on a clear night(or day), with no fog, smoke, particulates, is there some formula or equation that determines the loss of energy per meter, assuming the beam stays relatively concentrated, and doesnt spread out too much? How would that laser do compared to 200mW lasers of 405, 450, 635, 650 as far as maintaining its energy over distance?
If you accidentally hit a person in the eye, who isnt wearing safety goggles with a quality 400mW 650nm laser at 300 feet or 100 meters, would it still likely do damage if the person doesnt blink or move for a few seconds?
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