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  2. Geometry Dash - Wikipedia

    en.wikipedia.org/wiki/Geometry_Dash

    Geometry Dash is a side-scrolling music platforming game series developed by Robert Topala. The game was released on 13 August 2013 on iOS and Android, and the Windows and macOS versions on 22 December 2014. In Geometry Dash, players control the movement of an icon and navigate music-based levels while avoiding obstacles such as spikes.

  3. Speed of light - Wikipedia

    en.wikipedia.org/wiki/Speed_of_Light

    v. t. e. The speed of light in vacuum, commonly denoted c, is a universal physical constant that is exactly equal to 299,792,458 metres per second (approximately 300,000 kilometres per second; 186,000 miles per second; 671 million miles per hour).

  4. List of game engines - Wikipedia

    en.wikipedia.org/wiki/List_of_game_engines

    2D-based level geometry, sprites, and particles, uses clever methods to give illusion of 3D depth. id Tech 2 Quake engine: C: 1999 QuakeC: Yes 3D Windows, Linux, macOS: Quake: GPL-2.0-or-later: Also termed the Quake engine. First true 3D id Tech engine. id Tech 2.5 Quake II engine: C: 2001 C: Yes 3D Windows, Linux, macOS: Quake II: GPL-2.0-or ...

  5. Talk:List of hardest levels on Geometry Dash - Wikipedia

    en.wikipedia.org/wiki/Talk:List_of_hardest...

    List of hardest levels on Geometry Dash. Currently, a lot of people who play Geometry Dash look up to become the greatest player on Geometry Dash. This is upon thousands upon THOUSANDS of people who wish to become the greatest player, and that is what makes this page important. Geometry Dash players wish to have a dream and unlike other games ...

  6. Faster Than the Speed of Night - Wikipedia

    en.wikipedia.org/wiki/Faster_Than_the_Speed_of_Night

    Faster Than the Speed of Night is the fifth studio album by Welsh singer Bonnie Tyler. It was released in Europe on 8 April 1983 and later that year in the US through Columbia Records. After releasing four albums on RCA, Tyler signed with CBS Records and changed musical direction. Soon after, she began working with Jim Steinman who produced the ...

  7. Euclid - Wikipedia

    en.wikipedia.org/wiki/Euclid

    Euclid (/ ˈ j uː k l ɪ d /; Greek: Εὐκλείδης; fl. 300 BC) was an ancient Greek mathematician active as a geometer and logician. Considered the "father of geometry", he is chiefly known for the Elements treatise, which established the foundations of geometry that largely dominated the field until the early 19th century.

  8. Geometrical optics - Wikipedia

    en.wikipedia.org/wiki/Geometrical_optics

    Geometrical optics. Geometrical optics, or ray optics, is a model of optics that describes light propagation in terms of rays. The ray in geometrical optics is an abstraction useful for approximating the paths along which light propagates under certain circumstances. The simplifying assumptions of geometrical optics include that light rays:

  9. Orders of magnitude (speed) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(speed)

    Typical scanning speed of an audio compact disc; the speed of signals ( action potentials) traveling along axons in the human cortex. 1–1.5. 3.6–5.4. 2.2–3.4. 3.3–5.0 × 10 −9. Average walking speed—below a speed of about 2 m/s, it is more efficient to walk than to run, but above that speed, it is more efficient to run.