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  2. Electron mass - Wikipedia

    en.wikipedia.org/wiki/Electron_mass

    In particle physics, the electron mass (symbol: m e) is the mass of a stationary electron, also known as the invariant mass of the electron. It is one of the fundamental constants of physics. It has a value of about 9.109 × 10 −31 kilograms or about 5.486 × 10 −4 daltons, which has an energy-equivalent of about 8.187 × 10 −14 joules or ...

  3. Mass-to-charge ratio - Wikipedia

    en.wikipedia.org/wiki/Mass-to-charge_ratio

    The CODATA recommended value is −e/⁠m e = −1.758 820 008 38 (55) × 10 11 C⋅kg −1. [2] CODATA refers to this as the electron charge-to-mass quotient, but ratio is still commonly used. There are two other common ways of measuring the charge-to-mass ratio of an electron, apart from Thomson and Dunnington's methods.

  4. Electron - Wikipedia

    en.wikipedia.org/wiki/Electron

    [g] The maximum magnitude of this wavelength shift is h/m e c, which is known as the Compton wavelength. [116] For an electron, it has a value of 2.43 × 10 −12 m. [80] When the wavelength of the light is long (for instance, the wavelength of the visible light is 0.4–0.7 μm) the wavelength shift becomes negligible.

  5. Elementary charge - Wikipedia

    en.wikipedia.org/wiki/Elementary_charge

    Thus, an object's charge can be exactly 0 e, or exactly 1 e, −1 e, 2 e, etc., but not ⁠ 1 / 2 ⁠ e, or −3.8 e, etc. (There may be exceptions to this statement, depending on how "object" is defined; see below.) This is the reason for the terminology "elementary charge": it is meant to imply that it is an indivisible unit of charge.

  6. Fine-structure constant - Wikipedia

    en.wikipedia.org/wiki/Fine-structure_constant

    The value of the fine-structure constant α is linked to the observed value of this coupling associated with the energy scale of the electron mass: the electron's mass gives a lower bound for this energy scale, because it (and the positron) is the lightest charged object whose quantum loops can contribute to the running.

  7. Rydberg constant - Wikipedia

    en.wikipedia.org/wiki/Rydberg_constant

    The CODATA value is = = 10 973 731.568 157 (12) m −1, [2] where is the rest mass of the electron (i.e. the electron mass),; is the elementary charge,; is the permittivity of free space,

  8. List of electromagnetism equations - Wikipedia

    en.wikipedia.org/wiki/List_of_electromagnetism...

    Lorentz force on a charged particle (of charge q) in motion (velocity v), used as the definition of the E field and B field. Here subscripts e and m are used to differ between electric and magnetic charges .

  9. Energy–momentum relation - Wikipedia

    en.wikipedia.org/wiki/Energy–momentum_relation

    Einstein Triangle. The energy–momentum relation is consistent with the familiar mass–energy relation in both its interpretations: E = mc 2 relates total energy E to the (total) relativistic mass m (alternatively denoted m rel or m tot), while E 0 = m 0 c 2 relates rest energy E 0 to (invariant) rest mass m 0.