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rapidity meaning

EN
WRapidity
  • In relativity, rapidity is an alternative to speed as a measure of rate of motion. On parallel velocities (say, in one-dimensional space) rapidities are simply additive, unlike speeds at relativistic velocities.
  • Using the inverse hyperbolic function artanh, the rapidity φ corresponding to velocity v is φ = artanh(v / c). For low speeds, φ is approximately v / c.
  • Mathematically, rapidity can be defined as the hyperbolic angle that differentiates two frames of reference in relative motion, each frame being associated with distance and time coordinates.
rapidity
rapidity
  • Part-of-Speech Hierarchy
    1. Nouns
      • Countable nouns

    Other Vocabulary

    Look-Alike Words
    1. en rabidity
    2. fr rapidité
    3. en vapidity
    4. en sapidity
    5. en rapidly
    Source: Wiktionary

    Meaning of rapidity for the defined word.

    Grammatically, this word "rapidity" is a noun, more specifically, a countable noun.
    Difficultness: Level 2
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    Definiteness: Level 1
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