Planck
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(pläŋk)
(physics) A unit of action equal to the product of an energy of 1 joule and a time of 1 second.
Wiley Book of Astronomy:
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Planck
A European Space Agency spacecraft designed to search for tiny irregularities in the cosmic microwave background over the whole sky with unprecedented sensitivity and angular resolution. Named after the quantum theorist Max Planck (1858–1947), it is expected to provide a wealth of information relevant to several key cosmological and astrophysical issues, such as theories of the early universe and the origin of cosmic structure. Planck is scheduled for launch in 2007.
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[Etymology: M. K. E. L. Planck; Germany 1858-1947] power A rate of working of one joule per second, equal to the watt.
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Planck
IN BRIEF: n. - German physicist whose explanation of blackbody radiation in the context of quantized energy emissions initiated quantum theory (1858-1947).
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McGraw-Hill Science & Technology Dictionary
McGraw-Hill Dictionary of Scientific and Technical Terms. Copyright © 2003, 1994, 1989, 1984, 1978, 1976, 1974 by McGraw-Hill Companies, Inc. All rights reserved.
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Wiley Book of Astronomy
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Oxford Dictionary of Units & Measures
A Dictionary of Weights, Measures, and Units. Copyright © Donald Fenna 2002, 2004. All rights reserved.
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