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  2. Optical properties - Wikipedia

    en.wikipedia.org/wiki/Optical_properties

    The optical properties of matter are studied in optical physics (a subfield of optics) and applied in materials science. The optical properties of matter include: Refractive index; Dispersion; Transmittance and Transmission coefficient; Absorption; Scattering; Turbidity; Reflectance and Reflectivity (reflection coefficient) Albedo; Perceived ...

  3. List of optics equations - Wikipedia

    en.wikipedia.org/wiki/List_of_optics_equations

    Visulization of flux through differential area and solid angle. As always ^ is the unit normal to the incident surface A, = ^, and ^ is a unit vector in the direction of incident flux on the area element, θ is the angle between them.

  4. Helmholtz reciprocity - Wikipedia

    en.wikipedia.org/wiki/Helmholtz_reciprocity

    Furthermore, it has been demonstrated experimentally that reciprocity does apply in a TEM under the right conditions, [28] but the underlying physics of the principle dictates that reciprocity can only be truly exact if ray transmission occurs through only scalar fields, i.e. no magnetic fields.

  5. Refraction - Wikipedia

    en.wikipedia.org/wiki/Refraction

    In physics, refraction is the redirection of a wave as it passes from one medium to another. The redirection can be caused by the wave's change in speed or by a change in the medium. [1] Refraction of light is the most commonly observed phenomenon, but other waves such as sound waves and water waves also experience refraction. How much a wave ...

  6. Optics - Wikipedia

    en.wikipedia.org/wiki/Optics

    Optics is the branch of physics that studies the behaviour and properties of light, including its interactions with matter and the construction of instruments that use or detect it. [1] Optics usually describes the behaviour of visible , ultraviolet , and infrared light.

  7. Numerical aperture - Wikipedia

    en.wikipedia.org/wiki/Numerical_aperture

    In optics, the numerical aperture (NA) of an optical system is a dimensionless number that characterizes the range of angles over which the system can accept or emit light. By incorporating index of refraction in its definition, NA has the property that it is constant for a beam as it goes from one material to another, provided there is no ...

  8. Refractive index - Wikipedia

    en.wikipedia.org/wiki/Refractive_index

    In optics, the refractive index (or refraction index) of an optical medium is the ratio of the apparent speed of light in the air or vacuum to the speed in the medium. The refractive index determines how much the path of light is bent, or refracted , when entering a material.

  9. Optical phenomenon - Wikipedia

    en.wikipedia.org/wiki/Optical_phenomenon

    Double refraction or birefringence of calcite and other minerals; ... "Wave Optics and Quantum–Optical Phenomena". Physics for Chemists. pp. 361–422.