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  2. Femtometre - Wikipedia

    en.wikipedia.org/wiki/Femtometre

    1000000 zeptometres = 1 femtometre = 1 fermi = 0.000001 nanometre = 10 −15 metres 1 000 000 000 000 femtometres = 1 millimetre . For example, the charge radius of a proton is approximately 0.841 femtometres [ 3 ] while the radius of a gold nucleus is approximately 8.45 femtometres.

  3. List of conversion factors - Wikipedia

    en.wikipedia.org/wiki/List_of_conversion_factors

    Within each table, ... ≡ 1 × 10 −15 m: fermi: fm ... while Troy weight is the system of mass where 12 troy ounces equals one troy pound.

  4. List of metric units - Wikipedia

    en.wikipedia.org/wiki/List_of_metric_units

    The solar flux unit is a unit of spectral irradiance equal to 10 −22 W⋅m −2 ⋅Hz −1 (100 yW⋅m −2 ⋅Hz −1). The nox (nx) is a unit of illuminance equal to 1 millilux (1 mlx). The nit (nt) is a unit of luminance equal to one candela per metre squared (1 cd⋅m −2). The lambert (L) is a unit of luminance equal to 10 4 /π cd⋅m ...

  5. Orders of magnitude (length) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(length)

    The micrometre (SI symbol: μm) is a unit of length in the metric system equal to 10 −6 metres (⁠ 1 / 1 000 000 ⁠ m = 0. 000 001 m). To help compare different orders of magnitude , this section lists some items with lengths between 10 −6 and 10 −5 m (between 1 and 10 micrometers , or μm).

  6. International System of Units - Wikipedia

    en.wikipedia.org/wiki/International_System_of_Units

    Here the metric prefix 'kilo-' (symbol 'k') stands for a factor of 1000; thus, 1 km = 1000 m. The SI provides twenty-four metric prefixes that signify decimal powers ranging from 10 −30 to 10 30, the most recent being adopted in 2022.

  7. Metric prefix - Wikipedia

    en.wikipedia.org/wiki/Metric_prefix

    A metric prefix is a unit prefix that ... by the International Bureau of Weights and ... used mainly in particle physics, is sometimes called a fermi. For large ...

  8. Charge carrier density - Wikipedia

    en.wikipedia.org/wiki/Charge_carrier_density

    Charge carrier density, also known as carrier concentration, denotes the number of charge carriers per volume.In SI units, it is measured in m −3.As with any density, in principle it can depend on position.

  9. Luttinger's theorem - Wikipedia

    en.wikipedia.org/wiki/Luttinger's_theorem

    Luttinger's theorem states that the volume enclosed by a material's Fermi surface is directly proportional to the particle density.. While the theorem is an immediate result of the Pauli exclusion principle in the case of noninteracting particles, it remains true even as interactions between particles are taken into consideration provided that the appropriate definitions of Fermi surface and ...