Science Past from the issue of August 25, 1962

By Science News, 13:21 PM August 9, 2012

RUBY LASER PIERCES A SAPPHIRE CRYSTAL — A pulsed ruby laser piercing a sapphire crystal is shown on this week’s front cover. The laser at the Radio Corporation of America Laboratories in Princeton, N.J., generates energy so intense that it can bore a sixteenth of an inch hole in the sapphire in a thousandth of a second. The heat produced at the surface of the crystal is at least 2,800 degrees centigrade. Lasers are devices that amplify light waves and emit them “in step” to form a highly dir...

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