Greek letter ν (nu) was derived from the ancient Phoenician letter 𐤍 (nūn) which, in turn, is believed to be derived from an Egyptian hieroglyph of a snake, 𓆓.
The lower-case letter ν has found many uses in maths and sciences:
- in statistics: degree of freedom
- in chemistry: the stoichiometric coefficient
- in materials science: Poisson’s ratio
- in particle physics: neutrino
- in physics: the frequency of a wave
For example, in Planck–Einstein relation, E is the energy of a photon, ν is its frequency and h is the Planck constant:
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