When people talk about the speed of light being a constant, they often leave out a very important qualifier: "in a vacuum." Light waves travel slower through certain media, and the same is true of ...

Years ago my mother had a Heathkit “Marine Depth Sounder” that also could (in theory) help locate fish. This fish finder used a rotating disk and a small neon light that indicated depth. Mom could ...

World’s first to deliver 100μm resolution at 10cm range, even with tiny, reflective or semi-transparent objects; ideal for highly accurate measurement towards flexible automation. A unique ...

The technique of taking proper tread depth measurements is usually one that is never taught. In preparation for performing their service duties on a fleet's tires, technicians are normally handed a $2 ...