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  2. Bragg's law - Wikipedia

    en.wikipedia.org/wiki/Bragg's_law

    where m is the Bragg order (a positive integer), λ B the diffracted wavelength, Λ the fringe spacing of the grating, θ the angle between the incident beam and the normal (N) of the entrance surface and φ the angle between the normal and the grating vector (K G). Radiation that does not match Bragg's law will pass through the VBG undiffracted.

  3. Alchian–Allen effect - Wikipedia

    en.wikipedia.org/wiki/Alchian–Allen_effect

    The Alchian–Allen effect was described in 1964 by Armen Alchian and William R Allen in the book University Economics (now called Exchange and Production [1]).It states that when the prices of two substitute goods, such as high and low grades of the same product, are both increased by a fixed per-unit amount such as a transportation cost or a lump-sum tax, consumption will shift toward the ...

  4. Slutsky equation - Wikipedia

    en.wikipedia.org/wiki/Slutsky_equation

    A Giffen good is a product in greater demand when the price increases, which is also a special case of inferior goods. [5] In the extreme case of income inferiority, the size of the income effect overpowers the size of the substitution effect, leading to a positive overall change in demand responding to an increase in the price.

  5. Davisson–Germer experiment - Wikipedia

    en.wikipedia.org/wiki/Davisson–Germer_experiment

    The experimental outcome was 0.165 nm via Bragg's law, which closely matched the predictions. As Davisson and Germer state in their 1928 follow-up paper to their Nobel prize winning paper, "These results, including the failure of the data to satisfy the Bragg formula, are in accord with those previously obtained in our experiments on electron ...

  6. Law of demand - Wikipedia

    en.wikipedia.org/wiki/Law_of_demand

    The law of demand applies to a variety of organisational and business situations. Price determination, government policy formation etc are examples. [6] Together with the law of supply, the law of demand provides to us the equilibrium price and quantity. Moreover, the law of demand and supply explains why goods are priced at the level that they ...

  7. Marshallian demand function - Wikipedia

    en.wikipedia.org/wiki/Marshallian_demand_function

    Although Marshallian demand is in the context of partial equilibrium theory, it is sometimes called Walrasian demand as used in general equilibrium theory (named after Léon Walras). According to the utility maximization problem, there are L {\displaystyle L} commodities with price vector p {\displaystyle p} and choosable quantity vector x ...

  8. Bohr–Sommerfeld model - Wikipedia

    en.wikipedia.org/wiki/Bohr–Sommerfeld_model

    The Sommerfeld quantization can be performed in different canonical coordinates and sometimes gives different answers. The incorporation of radiation corrections was difficult, because it required finding action-angle coordinates for a combined radiation/atom system, which is difficult when the radiation is allowed to escape.

  9. Mathematical optimization - Wikipedia

    en.wikipedia.org/wiki/Mathematical_optimization

    Global optimization is the branch of applied mathematics and numerical analysis that is concerned with the development of deterministic algorithms that are capable of guaranteeing convergence in finite time to the actual optimal solution of a nonconvex problem.