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2. Anglepoise lamp - Wikipedia

   en.wikipedia.org/wiki/Anglepoise_lamp

   Close-up of the springs on an Anglepoise 90 lamp. A key feature of the Anglepoise design and patent is the placement of all springs (either three or four) near the base. The design was extensively copied by other companies, usually in simplified form, and is still in use. Some derivatives use a heavy balance weight instead of the springs.

3. Ivan the Terrible and His Son Ivan - Wikipedia

   en.wikipedia.org/wiki/Ivan_the_Terrible_and_His...

   199.5 cm × 254 cm (78.5 in × 100 in) Location. Tretyakov Gallery, Moscow. Ivan the Terrible and His Son Ivan on 16 November 1581[ a ] is a painting by Russian realist artist Ilya Repin made between 1883 and 1885. It depicts the grief-stricken Russian tsar Ivan the Terrible cradling his dying son, the Tsarevich Ivan Ivanovich, shortly after ...

4. Coandă effect - Wikipedia

   en.wikipedia.org/wiki/Coandă_effect

   This is a demonstration of the Coandă effect. The ball "sticks" to the lower side of the air stream, which stops the ball from falling down. The jet as a whole keeps the ball some distance from the jet exhaust, and gravity prevents it from being blown away. The Coandă effect (/ ˈkwɑːndə / or / ˈkwæ -/) is the tendency of a fluid jet to ...

5. Arc lamp - Wikipedia

   en.wikipedia.org/wiki/Arc_lamp

   A mercury arc lamp from a fluorescence microscope. A krypton long arc lamp (top) is shown above a xenon flashtube. The two lamps, used for laser pumping, are very different in the shape of the electrodes, in particular, the cathode (on the left). An arc lamp or arc light is a lamp that produces light by an electric arc (also called a voltaic arc).

6. Sconce (light fixture) - Wikipedia

   en.wikipedia.org/wiki/Sconce_(light_fixture)

   A sconce or wall light is a decorative light fixture that is mounted to a wall. [1] The sconce is a very old form of fixture, historically used with candles and oil lamps. They can provide general room lighting, and are common in hallways and corridors, but they may be mostly decorative. [1] A sconce may be a traditional torch, cresset, candle ...

7. Maze-solving algorithm - Wikipedia

   en.wikipedia.org/wiki/Maze-solving_algorithm

   Robot in a wooden maze. A maze-solving algorithm is an automated method for solving a maze.The random mouse, wall follower, Pledge, and Trémaux's algorithms are designed to be used inside the maze by a traveler with no prior knowledge of the maze, whereas the dead-end filling and shortest path algorithms are designed to be used by a person or computer program that can see the whole maze at once.