hard radiation


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Related to hard radiation: soft radiation

hard radiation

[′härd ‚rād·ē′ā·shən]
(physics)
Radiation whose particles or photons have a high energy and, as a result, readily penetrate all kinds of materials, including metals.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.