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  2. 1 + 2 + 3 + 4 + ⋯ - Wikipedia

    en.wikipedia.org/wiki/1_%2B_2_%2B_3_%2B_4_%2B_%E...

    One can then prove that this smoothed sum is asymptotic to ⁠− + 1 / 12 ⁠ + CN 2, where C is a constant that depends on f. The constant term of the asymptotic expansion does not depend on f : it is necessarily the same value given by analytic continuation, ⁠− + 1 / 12 ⁠ .

  3. Branching fraction - Wikipedia

    en.wikipedia.org/wiki/Branching_fraction

    Branching fractions from the P3/2 and P1/2 states in 88 Sr+. In the field of atomic, molecular, and optical physics, a branching fraction refers to the probability of decay to a specific lower-lying energy states from some excited state.

  4. Magnitude of eclipse - Wikipedia

    en.wikipedia.org/wiki/Magnitude_of_eclipse

    The magnitude of eclipse is the fraction of the angular diameter of a celestial body being eclipsed. [1] This applies to all celestial eclipses. The magnitude of a partial or annular solar eclipse is always between 0.0 and 1.0, while the magnitude of a total solar eclipse is always greater than or equal to 1.0, and has a theoretically maximum ...

  5. Decibel - Wikipedia

    en.wikipedia.org/wiki/Decibel

    The decibel originates from methods used to quantify signal loss in telegraph and telephone circuits. Until the mid-1920s, the unit for loss was miles of standard cable (MSC). 1 MSC corresponded to the loss of power over one mile (approximately 1.6 km) of standard telephone cable at a frequency of 5000 radians per second (795.8 Hz), and matched closely the smallest attenuation detectable to a ...

  6. 1:12 scale - Wikipedia

    en.wikipedia.org/wiki/1:12_scale

    Queen Mary's Dolls' House. The 1:12 scale is a traditional scale (ratio) for models and miniatures. In this scale (ratio), one inch on the scale model or miniature is equal to twelve inches on the original object being copied.

  7. Minor actinide - Wikipedia

    en.wikipedia.org/wiki/Minor_actinide

    A minor actinide is an actinide, other than uranium or plutonium, found in spent nuclear fuel.The minor actinides include neptunium (element 93), americium (element 95), curium (element 96), berkelium (element 97), californium (element 98), einsteinium (element 99), and fermium (element 100). [2]

  8. Henderson–Hasselbalch equation - Wikipedia

    en.wikipedia.org/wiki/Henderson–Hasselbalch...

    In chemistry and biochemistry, the Henderson–Hasselbalch equation = + ⁡ ([] []) relates the pH of a chemical solution of a weak acid to the numerical value of the acid dissociation constant, K a, of acid and the ratio of the concentrations, [] [] of the acid and its conjugate base in an equilibrium.

  9. Michelson–Morley experiment - Wikipedia

    en.wikipedia.org/wiki/Michelson–Morley_experiment

    The path difference is zero only when the interferometer is aligned with or perpendicular to the aether wind, and it reaches a maximum when it is at a 45° angle. The path difference can be any fraction of the wavelength, depending on the angle and speed of the aether wind.