From pacing out distances with our feet to defining the kilogram by the Planck constant, measurement has come a long way. Across history, humans have sought consistent ways to compare, quantify, and ...

Uncertainty affects the accuracy with which measurements can be made in quantum physics. To reduce this uncertainty, physicists have learned to "squeeze" certain measurements. Researchers are now ...

Einstein’s relativity, optical atomic clocks, and November’s Perimeter Institute public lecture from David Wineland. With some added geek nostalgia A while ago the Independent asked me, and others, to ...

Scientists have performed the most accurate measurement yet of the Boltzmann constant. While the impact of such an achievement is not immediately obvious, the measurement could revolutionize the way ...

“It’s not maths that makes physics a science. It’s the fact that you measure things,” says Michael de Podesta in this week’s Physics World Weekly podcast. De Podesta is in conversation with Physics ...

CBSE Class 11 Physics notes on Chapter 2, Units and Measurement (Part 1) are available here. Important topics covered in these notes are Physical quantities, Units, Fundamental (or Base) units, ...

New and improved measurements of the heaviest quark. Also, in what sense do protons get bigger as they go faster, and how do we know? It has been an interesting summer for particle physics. The first ...