mass absorption law
mass absorption law[′mas əb′sȯrp·shən ‚lȯ]
The law that the absorption of electrons with speeds greater than one-fifth that of light depends only on the mass of absorbing matter in the electron's path and not on its chemical composition. Also known as Lenard's mass absorption law.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.