Rydberg constant

noun
variants: or Rydberg unit

Definition of Rydberg constant 

: a wave number characteristic of the atomic spectrum of each element equal to the constant factor in the wave-number formula for all the spectral series of the elements and having a value from 109,678 cm−1 for hydrogen to 109,737 cm−1 for the heaviest elements

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First Known Use of Rydberg constant

1900, in the meaning defined above

History and Etymology for Rydberg constant

after Johannes R. Rydberg

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The first known use of Rydberg constant was in 1900

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