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  2. Software cracking - Wikipedia

    en.wikipedia.org/wiki/Software_cracking

    Software crack illustration. Software cracking (known as "breaking" mostly in the 1980s [1]) is an act of removing copy protection from a software. [2] Copy protection can be removed by applying a specific crack. A crack can mean any tool that enables breaking software protection, a stolen product key, or guessed password. Cracking software ...

  3. Empress (cracker) - Wikipedia

    en.wikipedia.org/wiki/Empress_(cracker)

    Empress (sometimes stylized EMPRESS) was a video game cracker who specializes in breaking anti-piracy software. While the true identity of Empress is unknown, she refers to herself as a young Russian woman. [1] [2] Empress has also released cracked games under the moniker C000005. [3] Empress is known as one of the few crackers who can crack ...

  4. List of refractive indices - Wikipedia

    en.wikipedia.org/wiki/List_of_refractive_indices

    Refraction at interface. Many materials have a well-characterized refractive index, but these indices often depend strongly upon the frequency of light, causing optical dispersion. Standard refractive index measurements are taken at the "yellow doublet" sodium D line, with a wavelength (λ) of 589 nanometers.

  5. Ray tracing (physics) - Wikipedia

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

    Ray tracing of a beam of light passing through a medium with changing refractive index.The ray is advanced by a small amount, and then the direction is re-calculated. Ray tracing works by assuming that the particle or wave can be modeled as a large number of very narrow beams (), and that there exists some distance, possibly very small, over which such a ray is locally straight.

  6. Ray tracing (graphics) - Wikipedia

    en.wikipedia.org/wiki/Ray_tracing_(graphics)

    To test for this the ray tracer must compute and keep the product of the global and reflection coefficients as the rays are traced. Example: let Kr = 0.5 for a set of surfaces. Then from the first surface the maximum contribution is 0.5, for the reflection from the second: 0.5 × 0.5 = 0.25, the third: 0.25 × 0.5 = 0.125, the fourth: 0.125 × ...

  7. Autorefractor - Wikipedia

    en.wikipedia.org/wiki/Autorefractor

    The majority of autorefractors calculate the vision correction a patient needs (refraction) by using sensors that detect the reflections from a cone of infrared light. These reflections are used to determine the size and shape of a ring in the retina which is located in the posterior part of the eye.

  8. List of ray tracing software - Wikipedia

    en.wikipedia.org/wiki/List_of_ray_tracing_software

    Photopia Optical Design Software: Proprietary: Yes No No No Picogen: GPLv3 Yes No Yes No Pixar RenderMan: Proprietary: Yes Yes Yes No Pixie GPL: Yes Yes Yes No POV-Ray: AGPLv3: Yes Yes Yes Quadoa Optical CAD: Proprietary: Yes No Yes No Rayshade: pre-gpl open source, gpl-like Yes Yes Yes Yes Radiance: BSD: Yes Yes Yes No Realsoft 3D: Proprietary ...

  9. Angle of incidence (optics) - Wikipedia

    en.wikipedia.org/wiki/Angle_of_incidence_(optics)

    The angle of reflection and angle of refraction are other angles related to beams. In computer graphics and geography , the angle of incidence is also known as the illumination angle of a surface with a light source, such as the Earth 's surface and the Sun . [ 1 ]