In 1878—before Einstein was born, before quantum mechanics, before we knew that our galaxy was one among many—a well-known physicist named Phillip von Jolly told young Max Planck, a student ...

Related: 'Stranger Things': How Realistic Are Parallel Worlds? Named for physicist Max Planck, this fundamental physical constant links the amount of energy carried by a photon with its frequency.

It is just the cool factor. [Stoppi] shows us several neat ways to measure Planck’s constant (German language, Google Translate link) using things like LEDs, solar cells, and common test equipment.

The great majority of physicists were skeptical of the young man’s radical theory of light, in which the speed of light was constant, but distance and time were eerily flexible. But Planck saw ...

That’s pretty much all you need for instruments to determine Planck’s constant to a decent degree of precision, the way that [poblocki1982]’s did. There’s a little more to it, of course ...

Knowing this constant will let NIST redefine the kilogram. Researchers at the National Institute of Standards and Technology (NIST) have made their most precise determination yet of Planck’s ...

Planck's constant is a pretty important part of modern physics, but it's also pretty confusing. Maybe you were wondering what it was while reading about the new kilogram definition. Well never ...

The almost impossibly brief Planck time has been known since the 19th century. Originally dismissed as a mere curiosity, it may hold the key to understanding the universe. When you purchase ...

A better option is to develop a new definition based on a mathematical foundation that can be calculated anywhere, and the Planck constant fits the bill. This formula allows researchers to find ...

Now, it’s just a cylinder with a lot of history. Starting in May, the kilogram will be defined in terms of Planck’s constant, a number that relates a radio wave’s energy to its frequency.