Weighting and Gamma Rays
In the measurement of gamma rays or other ionising radiation, a radiation monitor or dosimeter will commonly use a filter to attenuate those energy levels or wavelengths that cause the least damage to the human body, while letting through those that do the most damage, so that any source of radiation may be measured in terms of its true danger rather than just its 'strength'. The resulting unit is the sievert or microsievert.
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Famous quotes containing the word rays:
“I am often mad, but I would hate to be nothing but mad: and I think I would lose what little value I may have as a writer if I were to refuse, as a matter of principle, to accept the warming rays of the sun, and to report them, whenever, and if ever, they happen to strike me.”
—E.B. (Elwyn Brooks)