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The French chemist Marcellin Berthelot (1888) discovered an early Greek alchemical text "from the sanctuary of the temple" that says the Egyptians produced "the carbuncle that shines in the night" from certain phosphorescent parts ("the bile") of marine animals, and when properly prepared these precious gems would glow so brightly at night ...
Stars made of glow-in-the-dark plastic are placed on walls, ceilings, or hanging from strings make a room look like the night sky. [29] Other objects like figurines, cups, posters, [30] lamp fixtures, toys [31] and bracelet beads may also glow. [32] Using blacklights makes these things glow brightly, common at raves, bedrooms, theme parks, and ...
Chemiluminescence kites, [17] emergency lighting, glow sticks [18] (party decorations). Combustion analysis: Certain free radical species (such as • CH and • OH) give off radiation at specific wavelengths. The heat release rate is calculated by measuring the amount of light radiated from a flame at those wavelengths. [19] Children's toys ...
Gaming has come a long way since a physicist invented what's believed to be the world’s first video game in 1958. "Tennis For Two" was, to say the least, a very basic game.
Gameknight999 is a series of children's novels written by Mark Cheverton, an author and engineer based in upstate New York, [1] and published from 2013 to 2017. The series is unofficially based on Minecraft and set within its world.
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A General Electric NE-34 glow lamp, manufactured circa 1930. Neon was discovered in 1898 by William Ramsay and Morris Travers.The characteristic, brilliant red color that is emitted by gaseous neon when excited electrically was noted immediately; Travers later wrote, "the blaze of crimson light from the tube told its own story and was a sight to dwell upon and never forget."
Christmas Elf Maze. This easy, printable maze is great for a last-minute Elf on the Shelf idea. All you need is a printer, paper, and ink. Plus, the maze will flex your little one's brain, keeping ...