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  2. Fixation disparity - Wikipedia

    en.wikipedia.org/wiki/Fixation_disparity

    Fixation disparity is a tendency of the eyes to drift in the direction of the heterophoria. While the heterophoria refers to a fusion-free vergence state, the fixation disparity refers to a small misalignment of the visual axes when both eyes are open in an observer with normal fusion and binocular vision. [1] The misalignment may be vertical, horizontal or both. The misalignment (a few ...

  3. Double Vision (Foreigner album) - Wikipedia

    en.wikipedia.org/wiki/Double_Vision_(Foreigner...

    Double Vision is the second studio album by the British-American rock band Foreigner, released on 20 June 1978 by Atlantic Records. Recorded between December 1977 and March 1978, it was Foreigner's only album co-produced by Keith Olsen and the last recording with bass guitarist Ed Gagliardi who would be later replaced by Rick Wills .

  4. Munsell color system - Wikipedia

    en.wikipedia.org/wiki/Munsell_color_system

    The Munsell color system, showing: a circle of hues at value 5 chroma 6; the neutral values from 0 to 10; and the chromas of purple-blue (5PB) at value 5. In colorimetry, the Munsell color system is a color space that specifies colors based on three properties of color: hue (basic color), value ( lightness ), and chroma (color intensity).

  5. Eyeglass prescription - Wikipedia

    en.wikipedia.org/wiki/Eyeglass_prescription

    Eyeglass prescription. An eyeglass prescription is an order written by an eyewear prescriber, such as an optometrist, that specifies the value of all parameters the prescriber has deemed necessary to construct and/or dispense corrective lenses appropriate for a patient. If an eye examination indicates that corrective lenses are appropriate, the ...

  6. Porro–Abbe prism - Wikipedia

    en.wikipedia.org/wiki/Porro–Abbe_prism

    A Porro–Abbe prism (sometimes called a Abbe–Porro prism ), named for Ignazio Porro and Ernst Abbe, is a type of reflection prism used in some optical instruments to alter the orientation of an image. It is a variant of the more common double Porro prism configuration.

  7. Double-slit experiment - Wikipedia

    en.wikipedia.org/wiki/Double-slit_experiment

    Double-slit experiment. In modern physics, the double-slit experiment demonstrates that light and matter can satisfy the seemingly incongruous classical definitions for both waves and particles. This ambiguity is considered evidence for the fundamentally probabilistic nature of quantum mechanics. This type of experiment was first performed by ...

  8. Amici prism - Wikipedia

    en.wikipedia.org/wiki/Amici_prism

    Amici prism. An Amici prism, named for the astronomer Giovanni Battista Amici, is a type of compound dispersive prism used in spectrometers. The Amici prism consists of two triangular prisms in contact, with the first typically being made from a medium-dispersion crown glass, and the second from a higher-dispersion flint glass.

  9. Double diffusive convection - Wikipedia

    en.wikipedia.org/wiki/Double_diffusive_convection

    Double diffusive convection is a fluid dynamics phenomenon that describes a form of convection driven by two different density gradients, which have different rates of diffusion. [2] Convection in fluids is driven by density variations within them under the influence of gravity. These density variations may be caused by gradients in the ...

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