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(1909–91), American physicist and inventor, born in Bridgeport, Conn. While a freshman at Harvard University in 1926, he became interested in polarized light (light oriented in a plane with respect to the source). Taking a leave of absence, he developed a new kind of polarizer, which he called Polaroid, by aligning and embedding crystals in a plastic sheet. Land returned to Harvard at the age of 19 but left again in his senior year to found a laboratory nearby. Joined by other young scientists, he applied the polarizing principle to light filters, optical devices, and motion picture processes. In 1937 the group became the Polaroid Corp. with Land as president and head of research. During World War II the corporation turned to military tasks, inventing infrared filters, dark-adaptation goggles, and target finders. In the late 1940s it introduced the first model of its most successful product, the self-developing Polaroid Land camera; it also put out a microscope for viewing living cells in natural color. For his contributions to the fields of polarized light, photography, and color perception, Land received numerous awards and honorary degrees.
An article from Funk & Wagnalls® New Encyclopedia. © 2006 World Almanac Education Group. A WRC Media Company. All rights reserved. Except as otherwise permitted by
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Video
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Apollo 11 Moon Landing
2:02 min
The first manned space mission and the first man on the moon on the Apollo 11 is reviewed in this History Channel video. Neil Armstrong, Michael Collins and Buzz Aldrin were the crew of the Apollo 11 sponsored by NASA. The date was 7/20/1969.
The first manned space mission and the first man on the moon on the Apollo 11 is reviewed in this History Channel video. Neil Armstrong, Michael Collins and Buzz Aldrin were the crew of the Apollo 11 sponsored by NASA. The date was 7/20/1969.
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The most powerful volcanic eruption in recorded history occurs on Krakatoa, a small, uninhabited volcanic island located west of Sumatra in Indonesia, on this day in 1883.
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Herbert Hoover Accepts 1932 Nomination
6:59 min
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3:13 min
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