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.

Planck’s constant, named for physicist Max Planck, is a key quantity in quantum physics. It’s the amount of energy carried by a photon with the frequency of its electromagnetic wave.

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.

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 ...

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 ...

Planck’s constant is one of the most important numbers in science. It describes the relationship between the energy and frequency of an electromagnetic wave in an equation known as the Planck ...

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 wavelength emitted is a function of the energy times a constant (h), now known as Planck's constant. Though Planck's idea was not immediately believed by most physicists, it is now accepted as ...

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 ...