If scientists had sacred objects, this would be one of them: a single, closely guarded 137-year-old cylinder of metal, housed in a vault outside of Paris. It is a prototype that precisely defines a ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. A fundamental constant of the universe may not be soconstant after all, according to a new study.

In 2018 the International System of Units will be redefined in terms of fundamental constants. Why this change is taking place is explained in this short film presented by Stephan Schlamminger of the ...

The experimental measurement of the fine-structure constant. © Pierre Cladé, Saïda Guellati-Khélifa and Tatsumi Aoyama The most precise measurement ever of the ...

Class 11 Physics Chapter wise revision notes for Chapter 2 Units and Measurement (Part I) are available here. These notes are based on latest CBSE Class 11 Physics syllabus and NCERT textbook for ...

Forbes contributors publish independent expert analyses and insights. I write about physics, science, academia, and pop culture. I'm teaching introductory Newtonian mechanics again this term, and as ...