They act as range finders or survey instruments. They can measure vast distances, and track and dock spaceships. Lasers can guide gigantic machines that bore tunnels in hard rock. They may check the motion of the earth crust. They can cut, drill, and weld metals.
Lasers make it possible to create holograms, or three-dimensional images.
Holograms on charge cards and identification cards make them less easy to forge. Holography gives clear underwater pictures and lets pilots see their instruments without looking down at them. Holography lets physicians view broken bones, human organs, and the back of the eye. Work Performed Laser technicians produce and work with lasers. Laser test technicians test lasers.