Major physics terms are explained in these articles. Here you can learn about some of the fundamental physics concepts.

Lenz's Law

Lenz's Law, a law of electromagnetic induction formulated in 1833 by the German physicist H.

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  • Cloud Chamber,

    Cloud Chamber,

    Cloud Chamber, a device used by nuclear physicists to detect and study elementary particles Among the many particles that can be detected are alpha particles, protons, electrons, positrons, and various types of mesons. See more »

  • Cryogenics


    Cryogenics, the production of very low temperatures and the study of phenomena at those temperatures. See more »

  • Doppler Effect

    Doppler Effect

    Doppler Effect, an apparent change in the frequency of waves, due to the relative motion of the source of the waves and the observer. See more »

  • Echo (sound)

    Echo (sound)

    Echo, a repeated sound. The term is usually used to refer to sound that is reflected from a surface and returned to its source after a noticeable delay. See more »

  • Elasticity


    Elasticity, the property of a substance that enables it to recover its original shape and size after it has been stretched, squeezed, or bent. See more »

  • Entropy


    Entropy, a measure of the disorder in a system containing energy or information. The less ordered a system is, the greater is its entropy. See more »

  • Ether (Physics)

    Ether (Physics)

    Ether, in physics and astronomy, the name given to an imaginary substance once assumed to fill the otherwise empty space between the stars and planets. See more »

  • Expansion


    Expansion, an increase in the volume of a substance, usually due to the addition of heat to the substance. See more »

  • Flexibility


    Flexibility, the property of a substance that enables it to bend without breaking. See more »

  • Geissler Tube

    Geissler Tube

    Geissler Tube, an electron tube that is used to study the behavior of gases. It was invented in the 1860's by Heinrich Geissler, a German. See more »

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