So, with just two cheap modules, you can build a laser proximity sensor—whether it is the thru-beam type or the reflective type. But I will not go into the build ideas as there are countless tutorials ...

Single laser. For most DIY tasks, like hanging pictures, mirrors, curtain rails and other décor, you need just a single laser beam, which is what this handy little tool offers.

Swapping surgical bone saws for laser beams. More lasers may allow for safer and more precise medical procedures. ... Breakthroughs, discoveries, and DIY tips sent every weekday.

Laser physicists have built a tractor beam that can repel and attract objects, using a hollow laser beam that is bright around the edges and dark in its centre. It is the first long-distance optical ...