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  2. Mott problem - Wikipedia

    en.wikipedia.org/wiki/Mott_problem

    In practice, virtually all high energy physics experiments, such as those conducted at particle colliders, involve wave functions which are inherently spherical. Yet, when the results of a particle collision are detected, they are invariably in the form of linear tracks (see, for example, the illustrations accompanying the article on bubble ...

  3. Thermodynamic activity - Wikipedia

    en.wikipedia.org/wiki/Thermodynamic_activity

    The relative activity of a species i, denoted a i, is defined [4] [5] as: = where μ i is the (molar) chemical potential of the species i under the conditions of interest, μ o i is the (molar) chemical potential of that species under some defined set of standard conditions, R is the gas constant, T is the thermodynamic temperature and e is the exponential constant.

  4. Fluidization - Wikipedia

    en.wikipedia.org/wiki/Fluidization

    When a gas flow is introduced through the bottom of a bed of solid particles, it will move upwards through the bed via the empty spaces between the particles. At low gas velocities, aerodynamic drag on each particle is also low, and thus the bed remains in a fixed state. Increasing the velocity, the aerodynamic drag forces will begin to ...

  5. Particle physics - Wikipedia

    en.wikipedia.org/wiki/Particle_physics

    Particle physics or high-energy physics is the study of fundamental particles and forces that constitute matter and radiation.The field also studies combinations of elementary particles up to the scale of protons and neutrons, while the study of combination of protons and neutrons is called nuclear physics.

  6. Matter wave - Wikipedia

    en.wikipedia.org/wiki/Matter_wave

    In solids, an electron quasiparticle is an electron where interactions with other electrons in the solid have been included. An electron quasiparticle has the same charge and spin as a "normal" ( elementary particle ) electron and, like a normal electron, it is a fermion .

  7. Observer effect (physics) - Wikipedia

    en.wikipedia.org/wiki/Observer_effect_(physics)

    Physicists have found that observation of quantum phenomena by a detector or an instrument can change the measured results of this experiment. Despite the "observer effect" in the double-slit experiment being caused by the presence of an electronic detector, the experiment's results have been interpreted by some to suggest that a conscious mind ...

  8. Segregation (materials science) - Wikipedia

    en.wikipedia.org/wiki/Segregation_(Materials...

    In materials science, segregation is the enrichment of atoms, ions, or molecules at a microscopic region in a materials system. While the terms segregation and adsorption are essentially synonymous, in practice, segregation is often used to describe the partitioning of molecular constituents to defects from solid solutions, [1] whereas adsorption is generally used to describe such partitioning ...

  9. Sessile drop technique - Wikipedia

    en.wikipedia.org/wiki/Sessile_drop_technique

    θ C is the contact angle, and γ SG, γ LG, γ SL represent the solidgas, gas–liquid, and liquid–solid interfaces, respectively. In materials science , the sessile drop technique is a method used for the characterization of solid surface energies , and in some cases, aspects of liquid surface energies. [ 1 ]