A number of reporters have asked me “What use are laser pointers?” Certainly there are some useful consumer applications: presentations, star gazing with others (e.g., Boy Scouts or school trips), and playing with pets. In a wilderness emergency, a laser pointer can be more effective t...
Many of these devices are low cost, operated with AAA batteries, produce a beam that can be seen easily hundreds of meters away yet are small enough to be carried in the pocket or on a key chain. One design is available where the laser pointer is co-housed with a functional writing pen...
This is an interesting practical use for laser pointers. Of course ushers should only use a low-powered "bullet" type pointer like those sold in pet stores, that take two or three hearing-aid style batteries. Care should be taken to avoid the eyes. If the beam from a small Class 2 (l...