An electronic tachometer is a straightforward enough device, in which the light reflections from a white spot on a rotating object are detected and counted over time, measuring the revolutions per ...

The monitoring of rotation can involve such sensor types as proximity, photoelectric, resolvers, encoders, and tachometer generators. Most determine direction of rotation, speed, and angular position ...

For a qualified optomechanical analysis of lens systems, centration measurements are the standard approach – especially when precision lenses with tight tolerances need to be checked for quality ...

The speed of Earth's rotation is about 1,000 miles per hour relative to its axis. Your exact speed of rotation due to Earth's spin depends on your latitude. The farther you are from the equator, the ...

Bucknell University Professor Katelyn Allers, physics & astronomy, is publishing the first measurement of atmospheric wind speed outside the solar system using a new technique she developed. Her study ...

Every second, the Earth spins at an incredible speed, completing a full rotation in just 24 hours. While this may seem ...