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  2. Gibbs paradox - Wikipedia

    en.wikipedia.org/wiki/Gibbs_paradox

    Removing or reinserting the wall is reversible, but the entropy increases when the barrier is removed by the amount. which is in contradiction to thermodynamics if you re-insert the barrier. This is the Gibbs paradox. The paradox is resolved by postulating that the gas particles are in fact indistinguishable.

  3. Prism (optics) - Wikipedia

    en.wikipedia.org/wiki/Prism_(optics)

    Prism (optics) An optical prism is a transparent optical element with flat, polished surfaces that are designed to refract light. At least one surface must be angled — elements with two parallel surfaces are not prisms. The most familiar type of optical prism is the triangular prism, which has a triangular base and rectangular sides.

  4. Šidák correction - Wikipedia

    en.wikipedia.org/wiki/Šidák_correction

    One can also compute confidence intervals matching the test decision using the Šidák correction by using 100 (1 − α) 1/m % confidence intervals. For continuous problems, one can employ Bayesian logic to compute m {\displaystyle m} from the prior-to-posterior volume ratio.

  5. Eötvös effect - Wikipedia

    en.wikipedia.org/wiki/Eötvös_effect

    The force of gravity and the normal force. The resultant force acts as the required centripetal force. The mathematical derivation for the Eötvös effect for motion along the Equator explains the factor 2 in the first term of the Eötvös correction formula. What remains to be explained is the cosine factor.

  6. Physics - Wikipedia

    en.wikipedia.org/wiki/Physics

    Physics is the natural science of matter, involving the study of matter, its fundamental constituents, its motion and behavior through space and time, and the related entities of energy and force. Physics is one of the most fundamental scientific disciplines, with its main goal being to understand how the universe behaves.

  7. Vertex distance - Wikipedia

    en.wikipedia.org/wiki/Vertex_distance

    Vertex distance is the distance between the back surface of a corrective lens, i.e. glasses (spectacles) or contact lenses, and the front of the cornea. Increasing or decreasing the vertex distance changes the optical properties of the system, by moving the focal point forward or backward, effectively changing the power of the lens relative to ...

  8. Larmor formula - Wikipedia

    en.wikipedia.org/wiki/Larmor_formula

    This is a coherent process, so the total power radiated is proportional to the square of the number of electrons accelerating. In electrodynamics, the Larmor formula is used to calculate the total power radiated by a nonrelativistic point charge as it accelerates. It was first derived by J. J. Larmor in 1897, [1] in the context of the wave ...

  9. Nicol prism - Wikipedia

    en.wikipedia.org/wiki/Nicol_prism

    A Nicol prism is a type of polarizer. It is an optical device made from calcite crystal used to convert ordinary light into plane polarized light . It is made in such a way that it eliminates one of the rays by total internal reflection , i.e. the ordinary ray is eliminated and only the extraordinary ray is transmitted through the prism .