A red laser with a certain output power has a better combustion power than a green laser

Many laser pointers used by speakers are not dangerous to use without goggles. If you have a simple, harmless high powered laser pointer for a presentation scene, it may be safe to use it without wearing goggles. If you are a few miles away, and someone points your way with a high-power laser pointer, right in your eyes, you will see it. But if the pointer points to the wall next to you, then you won't know where it is. The wavelengths of the red laser are 635 nm and 650 nm, and the wavelengths of the green laser are 515 nm, 520 nm and 532 nm. Lasers of different wavelengths will produce laser beams and spots of different colors during operation. A red laser with a certain output power has a better combustion power than a green laser. The different laser characteristics make the visibility of the red laser beam much weaker than that of the green laser of the same power. Green laser can achieve brighter and more obvious green laser beam radiation. Users can only determine the quality of the laser pointer based on exact requirements and personal preferences.