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 describes the relationship – in an equation known as the Planck-Einstein relation – between the energy and frequency of an electromagnetic wave.

The amount of energy is proportional to a very small quantity called h, known as Planck's constant, which subsequently shows up in almost all equations in quantum mechanics.

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.

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.

Television characters needed Planck's constant to save the world; here's what they could have known.

The latest version of the watt balance at the US National Institute of Standards and Technology (NIST) has made its first measurement of Planck’s constant (h) with an uncertainty of 34 parts per ...

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.

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 ...

This letter indicates the interpretations of Planck's constant (h) and of the fine-structure constant (α) which follow from this principle 1.