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WM Wm, wm, or variants may refer to:
Companies [link]
- Wal-Mart, an American retailing chain
- WM, former New York stock exchange ticker symbol for Washington Mutual, a former American savings bank
- WM, New York stock exchange ticker symbol for Waste Management, Inc, a North American garbage company
Science and medicine [link]
- Waldenström's macroglobulinemia, a rare form of blood cancer
- Working memory, a part of the short-term memory
- White matter, a type of brain tissue
Technology and computing [link]
- Window Maker, a window manager for the X Window System
- X window manager, a part in the X Window System
- Windows Media, a multimedia framework for media creation and distribution for Microsoft Windows
- Windows Messenger, a part included in the Microsoft Windows XP operating system
- Windows Mobile, an operating system for Pocket PCs
Sport [link]
- WM formation, a formation in association football, so called because it spells out the letters when viewed from above
- WrestleMania, a professional wrestling pay-per-view event
Military [link]
- The licence plate code used by the Germany Navy (Kriegsmarine) in World War II, standing for "Wehrmacht Marine"
- Waterloo Medal, a medal awarded to British soldiers who fought in the Waterloo campaign in 1815
- Woman Marine, a female member of the United States Marine Corps
Transport [link]
- Weight/Measurement, a term used in ship transport[clarification needed]
- Western Maryland Railway, a former railway in the United States
- Windward Islands Airways or Winair IATA airline code
Other [link]
- Wm. (also Wm), an abbreviation of the name William
- Worshipful Master, the head of a lodge in freemasonry
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This disambiguation page lists articles associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article. |
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Irradiance
In radiometry (measurement of electromagnetic radiation), irradiance is the radiant flux (power) received by a surface per unit area, and spectral irradiance is the irradiance of a surface per unit frequency or wavelength, depending on whether the spectrum is taken as a function of frequency or of wavelength. The SI unit of irradiance is the watt per square metre (W/m2), while that of spectral irradiance is the watt per square metre per hertz (W·m−2·Hz−1) or the watt per square metre per metre (W·m−3)—commonly the watt per square metre per nanometre (W·m−2·nm−1). The CGS unit erg per square centimetre per second (erg·cm−2·s−1) is often used in astronomy. Irradiance is often called "intensity" in branches of physics other than radiometry, but in radiometry this usage leads to confusion with radiant intensity.
Mathematical definitions
Irradiance
Irradiance of a surface, denoted Ee ("e" for "energetic", to avoid confusion with photometric quantities), is defined as
where
College of William & Mary
The College of William & Mary in Virginia (also known as William & Mary, or W&M) is a public research university located in Williamsburg, Virginia, United States. Privately founded in 1693 by letters patent issued by King William III and Queen Mary II, it is the second-oldest institution of higher education in the United States after Harvard University and the oldest in the American South. William & Mary is one of the original eight "Public Ivies," a term coined by Richard Moll in 1985 for publicly funded universities providing a quality of education considered comparable to that available in the Ivy League.
William & Mary educated U.S. Presidents Thomas Jefferson, James Monroe, and John Tyler as well as other key figures important to the development of the nation, including U.S. Supreme Court Chief Justice John Marshall, Speaker of the House Henry Clay, sixteen members of the Continental Congress, and four signers of the Declaration of Independence. W&M founded the Phi Beta Kappa academic honor society in 1776 and was the first school of higher education in the United States to install an honor code of conduct for students. The establishment of graduate programs in law and medicine in 1779 makes it one of the first universities in the United States.
