Imagine a satellite, floating in space. How would you measure its voltage? Yes, it probably has a non-zero voltage, a consequence of geospatial electric fields and ion and electron currents. The ...

You can measure objects on an iPhone using Apple's Measure app. The app is free and works with specific versions of the iPhone, iPad, and iPod. You may be able to ...

Researchers in Europe have developed a technique for obtaining accurate laser-based measurements of objects hidden behind complex scattering structures. They say that their mathematical formula, which ...

Tape measures are one of those things that you never seem to be able to find when you need them. Fortunately, it’s likely that you have your phone somewhere near you these days, and now Apple is ...

U-tube: the glass tube and piezoelectric speaker that were used to create the new mass sensor. (Courtesy: William Grover) A $12 device that can measure the mass of microgram-sized objects in fluid has ...

With the introduction of ARKit in iOS 11, Apple put a stake in the ground in the mobile Augmented Reality race. Some of the best early AR apps used your phone to measure linear distances—a digital ...