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Crookes tube — A Crookes tube. The electrons travel in straight lines from the cathode on the left, shown by the shadow cast by the cross on the fluorescence on the righthand wall. The anode is at the bottom. A Crookes tube is an early experimental electrical… … Wikipedia
X-ray tube — An X ray tube is a vacuum tube that produces X rays. They are used in X ray machines. X rays are part of the electromagnetic spectrum, an ionizing radiation with wavelengths shorter than ultraviolet light. X ray tubes evolved from experimental… … Wikipedia
Inventions in medieval Islam — A significant number of inventions were developed in the medieval Islamic world, a geopolitical region that has at various times extended from Al Andalus and Africa in the west to the Indian subcontinent and Malay Archipelago in the east.… … Wikipedia
Nail (anatomy) — Human nails Fingernails Toenails A nail is a horn like env … Wikipedia
StarBlade — Infobox VG title=Star Blade caption= developer = Namco, Panasonic Interactive Media publisher = Namco distributor = designer = version = released = 1991, 1994, 1996 genre = Shoot em up modes = Single Player ratings = platforms = Arcade, Sega CD,… … Wikipedia

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