The thickness of the light of the laser pointer

In any case, the laser pointer contains a power supply. Use the supplied battery to measure the current and voltage drop across the laser pointer, then simply calculate the series resistance of the plug-in power supply to be connected. To be on the safe side, measure again with the plug-in power connected, changing the resistance if necessary. What got you that idea? This high power laser pointer always contains a power source. Therefore no additional series resistance is required. Two unidentified perpetrators tried to blind the pilot of a Gifhorn federal police helicopter with laser beams on Thursday night. Police have started an investigation.

Unlike lasers, the items you list are more or less essential everyday items. Apples and pears, you know. On top of that, I'm also the owner of a reflector telescope. I want a powerful 500mw laser. No, the "mirror" in a telescope doesn't mean that when I turn on the pointer, my eyes and the eyes of everyone within a 10km radius immediately boil over. Light up cigarettes and matches and more, and a laser pointer from one of the countless relevant online stores should be able to do all of that. Powerful laser pointers are like dangerous fireworks. They are banned here, but anyone can easily get them from abroad.