Abcteach - Nc State University
Victor Hasselblad, (1906–1978), Sweden — invented the 6 x 6 cm single-lens reflex camera. Ibn al-Haytham (Alhazen), (965–1039), Iraq — camera obscura, pinhole camera, magnifying glass. Robert A. Heinlein, (1907–1988), U.S. — waterbed. Jozef Karol Hell, (1713–1789), Slovakia — the water pillar ................
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