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  2. Lambda (unit) - Wikipedia

    en.wikipedia.org/wiki/Lambda_(unit)

    Lambda (written λ, in lowercase) is a non-SI unit of volume equal to 10 −9 m 3, 1 cubic millimetre (mm 3) or 1 microlitre (μL). Introduced by the BIPM in 1880, [ 1 ] the lambda has been used in chemistry [ 2 ] and in law for measuring volume, but its use is not recommended.

  3. Wavelength - Wikipedia

    en.wikipedia.org/wiki/Wavelength

    In physics and mathematics, wavelength or spatial period of a wave or periodic function is the distance over which the wave's shape repeats. [ 1 ] [ 2 ] In other words, it is the distance between consecutive corresponding points of the same phase on the wave, such as two adjacent crests, troughs, or zero crossings .

  4. List of common physics notations - Wikipedia

    en.wikipedia.org/wiki/List_of_common_physics...

    Cartesian y-axis basis unit vector unitless kinetic energy: joule (J) wave vector: radian per meter (m −1) Boltzmann constant: joule per kelvin (J/K) wavenumber: radian per meter (m −1) stiffness: newton per meter (N⋅m −1) ^ Cartesian z-axis basis unit vector

  5. Lambda - Wikipedia

    en.wikipedia.org/wiki/Lambda

    The lambda particle is a type of subatomic particle in subatomic particle physics. Lambda is the set of logical axioms in the axiomatic method of logical deduction in first-order logic. There is a poetical allusion to the use of Lambda as a shield blazon by the Spartans. [citation needed] [4] Lambda is the von Mangoldt function in mathematical ...

  6. Cosmological constant - Wikipedia

    en.wikipedia.org/wiki/Cosmological_constant

    Thus, the Lambda-CDM model, the current standard model of cosmology which uses the FLRW metric, includes the cosmological constant, which is measured to be on the order of 10 −52 m −2. It may be expressed as 10 −35 s −2 (multiplying by c 2 ≈ 10 17 m 2 ⋅s −2 ) or as 10 −122 ℓ P −2 [ 27 ] (where ℓ P is the Planck length).

  7. Failure rate - Wikipedia

    en.wikipedia.org/wiki/Failure_rate

    The mean time between failures (MTBF, /) is often reported instead of the failure rate, as numbers such as "2,000 hours" are more intuitive than numbers such as "0.0005 per hour". However, this is only valid if the failure rate λ ( t ) {\displaystyle \lambda (t)} is actually constant over time, such as within the flat region of the bathtub curve.

  8. Spectral power distribution - Wikipedia

    en.wikipedia.org/wiki/Spectral_power_distribution

    Mathematically, for the spectral power distribution of a radiant exitance or irradiance one may write: =where M(λ) is the spectral irradiance (or exitance) of the light (SI units: W/m 2 = kg·m −1 ·s −3); Φ is the radiant flux of the source (SI unit: watt, W); A is the area over which the radiant flux is integrated (SI unit: square meter, m 2); and λ is the wavelength (SI unit: meter, m).

  9. List of physical quantities - Wikipedia

    en.wikipedia.org/wiki/List_of_physical_quantities

    Mass per unit volume kg/m 3: L −3 M: intensive Mean lifetime: τ: Average time for a particle of a substance to decay s T: intensive Molar concentration: C: Amount of substance per unit volume mol⋅m −3: L −3 N: intensive Molar energy: J/mol: Amount of energy present in a system per unit amount of substance J/mol L 2 M T −2 N −1 ...