Glossary

• A
• B
• C
• D
• E
• F
• G
• H
• I
• J
• K
• L
• M
• N
• O
• P
• Q
• R
• S
• T
• U
• V
• W
• X
• Y
• Z

Search

 USAF

United States Air Force

 USGS

United States Geological Survey

 USRP

Undergraduate Student Research Program

 ultraviolet

Electromagnetic radiation resembling visible light, but of shorter wavelength. The eye cannot see UV, and much of it is absorbed by ozone, a variant of oxygen, at altitudes of 30-40 km
Click for citation

 ultraviolet radiation

The energy range just beyond the violet end of the visible spectrum. Although ultraviolet radiation constitutes only about 5 percent of the total energy emitted from the sun, it is the major energy source for the stratosphere and mesosphere, playing a dominant role in both energy balance and chemical composition.
Click for citation