If the scene is big enough, the distance is far enough, it can not accurately indicate the distant target, and the laser has monochromatic and very good focus, the light effect is cool, it can shoot very far, completely replace us with fingers to indicate, it can be visually shot to the sky, so it is also known as the star artifact, can be used as a travel guide, sales sand table explanation, outdoor adventure, caving, aviation search and rescue and water, land and air to send out distress signals, etc.
In addition to playing, we can also do some optical experiments, for example, the red + green + blue three-color laser can be synthesized into a white laser, the red + green two-color laser can be mixed into a yellow laser, the focus produces a thermal energy effect and a magical light refraction test, etc.