The sensor is a flexible copper-plated sheet patterned with small squares that capture various light frequencies all at once, functioning like one big aperture.

ENGADGET

Hooke himself was a talented illustrator, evidenced by his impressive copper-plated illustrations of a flea, which opens to four times the size of a page in Micrographia.

UNESCO: UK National Commission for UNESCO - Celebrations across the UK of Hooke��s contributions to the Natural Sciences of Microscopy

They took the form of phonograph records: 12-inch gold-plated copper disks, engraved with directions to build a device that could play them.

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Many French horns, for example, are made of nickel silver, an alloy of copper, zinc, and nickel (it's silver in name and color only), and some are made of nickel bronze, an alloy of copper, tin, and nickel. (Brass itself is an alloy of copper and zinc.) Many brass instruments are silver-plated (sterling silver on brass), and some are gold-plated.

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The coins are made from steel but plated in nickel, replacing the current cupro-nickel version which contains 75% copper and 25% nickel.

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The Treasury plans to make the new coins from nickel-plated steel instead of the alloy, which has become more expensive as the price of copper has risen in recent years.

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