WHY WE NEED A GREEN LASER POINTER

The laser pointer is a device that is handheld and is relatively small that has power source mostly from batteries and a laser diode that emits a coherent low powered laser beam of light which is visible. It is used to highlight something simply by having it illuminated into a small spot that is bright of a colored light. Power is always restricted from exceeding 5Mw.   A green laser po...
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