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 ...

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 ...

And if you wanted to emit something harder, like X-rays, it would cost that much energy. Planck's constant was the link providing the scale between what kind of light you wanted to emit and how ...

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.

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.

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.

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 ...

The Planck constant describes the behavior of particles and waves on the atomic scale and depends on three units: the meter, kilogram and second. As the second and meter are measured and defined ...

They are doing this via the “Planck constant,” the number that relates a particle’s frequency, meaning how fast it goes through its wavelike motion, to its energy. From there, using Einstein ...

Jay Bennett - Former associate web editor, science. The NIST-4 Kibble balance, an electromagnetic weighing machine that is used to measure Planck's constant, and in turn, redefine the kilogram.