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  2. 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.

  3. Prism spectrometer - Wikipedia

    en.wikipedia.org/wiki/Prism_spectrometer

    Prism spectrometer. A prism spectrometer is an optical spectrometer which uses a dispersive prism as its dispersive element. The prism refracts light into its different colors ( wavelengths ). The dispersion occurs because the angle of refraction is dependent on the refractive index of the prism's material, which in turn is slightly dependent ...

  4. Maddox rod - Wikipedia

    en.wikipedia.org/wiki/Maddox_rod

    The Maddox rod test can be used to subjectively detect and measure a latent, manifest, horizontal or vertical strabismus for near and distance. The test is based on the principle of diplopic projection. [1] Dissociation of the deviation is brought about by presenting a red line image to one eye and a white light to the other, while prisms are ...

  5. Kerma (physics) - Wikipedia

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

    In radiation physics, kerma is an acronym for "kinetic energy released per unit mass" (alternately, "kinetic energy released in matter", [1] "kinetic energy released in material", [2] or "kinetic energy released in materials" [3] ), defined as the sum of the initial kinetic energies of all the charged particles liberated by uncharged ionizing ...

  6. Circulation (physics) - Wikipedia

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

    In physics, circulation is the line integral of a vector field around a closed curve. In fluid dynamics, the field is the fluid velocity field. In electrodynamics, it can be the electric or the magnetic field. Circulation was first used independently by Frederick Lanchester, Martin Kutta and Nikolay Zhukovsky. [citation needed]

  7. Astrometry - Wikipedia

    en.wikipedia.org/wiki/Astrometry

    Astrometry is a branch of astronomy that involves precise measurements of the positions and movements of stars and other celestial bodies. It provides the kinematics and physical origin of the Solar System and this galaxy, the Milky Way .

  8. AOL

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    Sign in to AOL Mail, a free and secure email service with advanced settings, mobile access, and personalized compose. Get live help from AOL experts if needed.

  9. Helmholtz resonance - Wikipedia

    en.wikipedia.org/wiki/Helmholtz_resonance

    The concept of Helmholtz resonance is fundamental in various fields, including acoustics, engineering, and physics. The resonator itself, termed a Helmholtz resonator, consists of two key components: a cavity and a neck. The size and shape of these components are crucial in determining the resonant frequency, which is the frequency at which the ...