Is the laser pointer used to explore the mystery of the cave?

Among all available laser colors, green is the most sensitive and brightest color. The 532nm green laser pointer beam has an ultra-long laser range of 1km to 10km, and the beam can be seen both day and night. Therefore, the pen-type green high power laser pointer low-consumption series is mainly used for business meetings, conferences, lectures, laboratory experiments, museums, galleries, exhibitions and other demonstrations. In addition, it is also the most important and common astrology astrology application. Telescope observation. The laser pointer-because it is painted for a long time exposure, fast light sources like real flicker are not good, you need those laser pointers. Darkness-just like light painting photography, you have to be in a dark place, it's not as easy as you think! If you are at home, a dark room is enough, if you are going outdoors, you must stay away from street lights or passing cars or bicycles, as they will definitely paint light in your lens and destroy them.