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English: Top: Expected results of Rutherford's gold foil experiment: alpha particles passing through the plum pudding model of the atom undisturbed. Bottom: Observed results: Some of the particles were deflected, and some by very large angles. Rutherford concluded that the positive charge of the atom must be concentrated into a very small ...
For the metal foil, they tested a variety of metals, but favoured gold because they could make the foil very thin, as gold is the most malleable metal. [16]: 127 As a source of alpha particles, Rutherford's substance of choice was radium, which is thousands of times more radioactive than uranium. [17]
The golden book: An artistic reflective foil element in the shape of an "open golden book". Tilt the banknote backward and forward and make sure that the "book" changes its color from gold to green. Simultaneously you can see the horizontal bar moving up and down the "book".
A gold nugget of 5 mm (0.2 in) in diameter (bottom) can be expanded through hammering into a gold foil of about 0.5 m 2 (5.4 sq ft). The Toi gold mine museum, Japan.. Gold leaf is gold that has been hammered into thin sheets (usually around 0.1 μm thick [1]) by a process known as goldbeating, [2] for use in gilding.
The golden book: An artistic reflective foil element in the shape of an "open golden book". Tilt the banknote backward and forward and make sure that the "book" changes its color from gold to green. Simultaneously you can see the horizontal bar moving up and down the "book".
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Overhead projector in operation, with a transparency being flashed. A transparency, also known variously as a viewfoil or foil (from the French word "feuille" or sheet), or viewgraph, is a thin sheet of transparent flexible material, typically polyester (historically cellulose acetate), onto which figures can be drawn.
Therefore, the transparency is placed face up (toward the mirror and focusing lens), in contrast with a 35mm slide projector or film projector (which lack such a mirror) where the slide's image is non-reversed on the side opposite the focusing lens. A related invention for enlarging transparent images is the solar camera.