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  2. Three-point lighting - Wikipedia

    en.wikipedia.org/wiki/Three-point_lighting

    The addition of a fourth light, the background light, makes for a four-point lighting setup. The background light is placed behind the subject(s), on a high grid, or low to the ground. Unlike the other three lights, which illuminate foreground elements like actors and props, it illuminates background elements, such as walls or outdoor scenery.

  3. Computer graphics lighting - Wikipedia

    en.wikipedia.org/wiki/Computer_graphics_lighting

    Computer graphics lighting is the collection of techniques used to simulate light in computer graphics scenes. While lighting techniques offer flexibility in the level of detail and functionality available, they also operate at different levels of computational demand and complexity.

  4. Light verb - Wikipedia

    en.wikipedia.org/wiki/Light_verb

    The light verbs are underlined, and the words in bold together constitute the light verb constructions. Each of these constructions is the (primary part of the) main predicate of the sentence. Note that the determiner a is usually NOT part of the light verb construction. We know that it is not part of the light verb construction because it is ...

  5. Optical fiber - Wikipedia

    en.wikipedia.org/wiki/Optical_fiber

    The light is guided down the core of the fiber by an optical cladding with a lower refractive index that traps light in the core through total internal reflection. For some types of fiber, the cladding is made of glass and is drawn along with the core from a preform with radially varying index of refraction.

  6. Immersion lithography - Wikipedia

    en.wikipedia.org/wiki/Immersion_lithography

    The lenses in the highest resolution "dry" photolithography scanners focus light in a cone whose boundary is nearly parallel to the wafer surface. As it is impossible to increase resolution by further refraction, additional resolution is obtained by inserting an immersion medium with a higher index of refraction between the lens and the wafer.

  7. Dash - Wikipedia

    en.wikipedia.org/wiki/Dash

    The dash is a punctuation mark consisting of a long horizontal line. It is similar in appearance to the hyphen but is longer and sometimes higher from the baseline.The most common versions are the en dash –, generally longer than the hyphen but shorter than the minus sign; the em dash —, longer than either the en dash or the minus sign; and the horizontal bar —, whose length varies ...

  8. Presentation program - Wikipedia

    en.wikipedia.org/wiki/Presentation_program

    LibreOffice Impress, one of the most popular free and open-source presentation programs. In computing, a presentation program (also called presentation software) is a software package used to display information in the form of a slide show.

  9. Optoelectronics - Wikipedia

    en.wikipedia.org/wiki/Optoelectronics

    Electronic light sensors. Optoelectronics (or optronics) is the study and application of electronic devices and systems that find, detect and control light, usually considered a sub-field of photonics. In this context, light often includes invisible forms of radiation such as gamma rays, X-rays, ultraviolet and infrared, in