| background density |
Density of any selection of a negative or print on which there is no image. Also referred to as Fog level.
출처: www.startphoto.com/learn/glossary/glossary_b-bh.ht...
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| background radiation |
The radiation found in the natural environment originating primarily from the naturally radioactive elements of Earth and from cosmic rays. The term may also mean radiation extraneous to an experiment.
출처: www.lbl.gov/abc/wallchart/glossary/glossary.html
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| background radiation |
means radiation from cosmic sources; naturally occurring radioactive material, including radon (except as a decay product of source or special nuclear material); and global fallout as it exists in the environment from the testing of nuclear explosive devices or from past nuclear accidents such as Chernobyl that contribute to background radiation and are not under the control of the licensee. ...
출처: www.nrc.gov/reading-rm/doc-collections/cfr/part020...
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| background retinopathy |
an early stage of diabetic retinopathy that usually does not impair vision - also referred to as "nonproliferative retinopathy"
출처: www.diabetes.org.au/glossary.htm
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| background radiation |
Amount of ionizing radiation to which a person is exposed from natural sources, such as naturally occurring radionuclides in the environment and body, or cosmogenic radionuclides resulting from cosmic ray interactions with matter in the stratosphere and troposphere.
출처: www.racteam.com/LANLRisk/Glossary.htm
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