A century after Albert Einstein said we would never be able to observe the instantaneous velocity of tiny particles as they randomly shake and shimmy (in so-called Brownian motion), physicist Mark ...

The instantaneous velocity of a Brownian particle has been measured for the first time, a result Einstein believed would be impossible. By trapping a micron-sized silica bead in air in an optical ...

Particle Image Velocimetry is a state-of-the-art non-intrusive flow measurement technique. Small tracer particles advected by the flow are illuminated twice by very short pulses of a laser light sheet ...

CBSE Class 11 Physics Notes on Chapter 3, Motion in a Straight Line are available here. The topics covered in these notes are Speed, Uniform Speed, Variable Speed, Average Speed, Instantaneous Speed, ...

The Tomographic Particle Image Velocimetry method is a relatively new extension of the PIV measurement technique with the specific ability to determine three-dimensional velocity vector fields [1].