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  2. Illumination problem - Wikipedia

    en.wikipedia.org/wiki/Illumination_problem

    Roger Penrose's solution of the illumination problem using elliptical arcs (blue) and straight line segments (green), with 3 positions of the single light source (red spot). The purple crosses are the foci of the larger arcs. Lit and unlit regions are shown in yellow and grey respectively.

  3. Holiday lighting technology - Wikipedia

    en.wikipedia.org/wiki/Holiday_lighting_technology

    A number of light sculptures feature in this elaborate display which surrounds a Nativity scene set in a basement garage. Lights are sometimes mounted on frames—typically metal for large lights and plastic for miniature ones. These were first used for public displays on lampposts, street lights, and telephone poles in cities and towns. For ...

  4. Luminaria - Wikipedia

    en.wikipedia.org/wiki/Luminaria

    Luminaria is a term used in different parts of the world to describe various types of holiday lights, usually displayed during Christmas. In English, the term most commonly refers to a specific type of simple paper lantern made by placing a votive candle in some sand inside a paper bag . [ 1 ]

  5. Christmas engineering work problems cause misery for ... - AOL

    www.aol.com/christmas-engineering-problems-cause...

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  6. Twinkle bulb - Wikipedia

    en.wikipedia.org/wiki/Twinkle_bulb

    A twinkle bulb is a special type of light bulb which blinks on and off for decorative effect. They are most commonly used on Christmas lights and other string lights, but can also be used for other ornamental purposes like electric jack-o-lanterns for Halloween and replica traffic lights.

  7. Inventing Christmas with Nalluri and Stevens is no problem - AOL

    www.aol.com/article/entertainment/2017/12/01/...

    Actor Dan Stevens and director Bharat Nalluri spread the holiday cheer at BUILD Series to discusses their new film, "The Man Who Invented Christmas' Inventing Christmas with Nalluri and Stevens is ...

  8. Alhazen's problem - Wikipedia

    en.wikipedia.org/wiki/Alhazen's_problem

    The problem comprises drawing lines from two points, meeting at a third point on the circumference of a circle and making equal angles with the normal at that point (specular reflection). Thus, its main application in optics is to solve the problem, "Find the point on a spherical convex mirror at which a ray of light coming from a given point ...

  9. Call to aspiring spies to see if you can solve GCHQ’s ...

    www.aol.com/news/call-aspiring-spies-see-solve...

    Ms Keast-Butler said: “Puzzles have always been at the heart of GCHQ, and the skills needed to solve them are just as relevant in 2024 as they were over 100 years ago.