natural units

What is Planck’s constant?

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Planck’s constant is the famous constant of proportionality discovered by Max Planck at the end of the 19th century. The constant is instrumental in calculating physical quantities on tiny scales including the properties of elementary particles. Calculating a particle’s wavelength, momentum, and energy is simple. Multiply Planck’s constant by the right inputs and out comes … Read more

What is the gravitational constant?

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The gravitational constant is a number. What sets it apart from other numbers is that you can multiply the gravitational constant by the mass and radius of a large body to find the strength of its gravitational field. Calculating acceleration, force, energy, and other gravitational potentials is simple. Just multiply the constant by the right … Read more