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  2. Kramers' law - Wikipedia

    en.wikipedia.org/wiki/Kramers'_law

    The formula for Kramers' law is usually given as the distribution of intensity (photon count) against the wavelength of the emitted radiation: [2] = () The constant K is proportional to the atomic number of the target element, and λ min {\displaystyle \lambda _{\text{min}}} is the minimum wavelength given by the Duane–Hunt law .

  3. Rule of four - Wikipedia

    en.wikipedia.org/wiki/Rule_of_four

    [1] The "Rule of Four" has been explained by various Justices in judicial opinions throughout the years. [2] For example, Justice Felix Frankfurter described the rule as follows: "The 'rule of four' is not a command of Congress. It is a working rule devised by the Court as a practical mode of determining that a case is deserving of review, the ...

  4. Duane–Hunt law - Wikipedia

    en.wikipedia.org/wiki/Duane–Hunt_law

    The Duane–Hunt law, named after the American physicists William Duane and Franklin L. Hunt, [1] gives the maximum frequency of X-rays that can be emitted by Bremsstrahlung in an X-ray tube by accelerating electrons through an excitation voltage V into a metal target. The maximum frequency ν max is given by [2]

  5. Structure factor - Wikipedia

    en.wikipedia.org/wiki/Structure_factor

    For X-ray crystallography they are multiples of the unit of scattering by a single electron (2.82 m); for neutron scattering by atomic nuclei the unit of scattering length of m is commonly used. The above discussion uses the wave vectors | k | = 2 π / λ {\displaystyle |\mathbf {k} |=2\pi /\lambda } and | q | = 4 π sin ⁡ θ / λ ...

  6. Lindsey Vonn to make World Cup skiing return in St. Moritz - AOL

    www.aol.com/lindsey-vonn-world-cup-skiing...

    Vonn announced her retirement from competitive skiing in 2019 after 18 years on the World Cup circuit. In that time, she recorded 82 World Cup race wins, eight world championship medals and three ...

  7. Modular arithmetic - Wikipedia

    en.wikipedia.org/wiki/Modular_arithmetic

    In fact, x ≡ b m n −1 m + a n m −1 n (mod mn) where m n −1 is the inverse of m modulo n and n m −1 is the inverse of n modulo m. Lagrange's theorem : If p is prime and f ( x ) = a 0 x d + ... + a d is a polynomial with integer coefficients such that p is not a divisor of a 0 , then the congruence f ( x ) ≡ 0 (mod p ) has at most d ...

  8. Hubie Brown, 91, in final season calling NBA games with ESPN

    www.aol.com/sports/hubie-brown-91-final-season...

    In 2002, 16 years after his last NBA coaching job, Brown, at age 69, was hired by the Memphis Grizzlies after Sidney Lowe was dismissed following an 0-8 start.

  9. Zach Ertz, Washington's second-leading receiver, ruled out vs ...

    www.aol.com/sports/zach-ertz-washingtons-second...

    December 15, 2024 at 2:48 PM Washington Commanders tight end Zach Ertz left Sunday's 20-19 win over the New Orleans Saints with a concussion. Ertz suffered the injury in the first half following a ...