# Planck constant

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Related to Planck constant: Joule, electron volt

## Planck con·stant (*h*),

(plahnk), a constant, 6.6260755 × 10

^{-34}J · s or 6.6260755 × 10^{-27}erg-seconds = 6.6260755 × 10^{-34}J Hz^{-1}. [Max

*Planck*]## Planck con·stant

**(h)**(plahngk kon'stănt)

A constant, 6.6260755 × 10

^{-34}J · s (joule-seconds) or 6.6260755 × 10^{-27}erg-seconds = 6.6260755 × 10^{-34}J Hz^{-1}(joule per hertz).[Max

*Planck*]## Planck,

Max, German physicist and Nobel laureate, 1858-1947.**Planck constant**- a natural constant occurring in many physical formulas.

**Planck theory**- that energy can be emitted, transmitted, and absorbed only in discrete quantities. Synonym(s):

**quantum theory**

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