Planck mass

The Planck mass is a small unit of mass used in physics. It is derived using an equation involving Planck's constant, the speed of light in a vacuum, and the gravitational constant. It is approximately 21.76 µg.

The Planck mass can be thought of as an upper bound for the mass of a single particle. A particle with more mass would become a black hole. It's also a lower bound for the smallest possible black hole, since a black hole this small wouldn't be able to emit any Hawking Radiation to evaporate any smaller.

As with all Planck units, the idea was to have a definition based only on fundamental universal constants.

References

Category:Physical quantity
Category:Units of mass