Irradiance
71Global warming — This article is about the change in climate Earth is currently experiencing. For general discussion of how Earth s climate can change, see Climate change …
72UARS (Satellit) — UARS Der Upper Atmosphere Research Satellite (UARS) ist ein US amerikanischer Erdbeobachtungssatellit. Er wurde am 12. September 1991 mit dem Space Shuttle Discovery (STS 48) gestartet und am dritten Flugtag mit dem Greifarm des Orbiters in eine… …
73Numerical aperture — The numerical aperture with respect to a point P depends on the half angle θ of the maximum cone of light that can enter or exit the lens. In optics, the numerical aperture (NA) of an optical system is a dimensionless number that characterizes… …
74Lux — For other uses, see Lux (disambiguation). A lux meter for measuring illuminances in work places. The lux (symbol: lx) is the SI unit of illuminance and luminous emittance measuring luminous power per area. It is used in photometry as a measure of …
75Solar cycle — The solar cycle, or the solar magnetic activity cycle, is the main source of periodic variation of all solar phenomena driving variations in space weather. [ [http://www7.nationalacademies.org/ssb/SSB Space weather97.pdf Space Weather: A Research …
76Radiance — For other uses, see Radiance (disambiguation). Radiance and spectral radiance are radiometric measures that describe the amount of radiation such as light or radiant heat that passes through or is emitted from a particular area, and falls within… …
77Photometer — In the broadest sense, a photometer is any instrument used to measure illuminance or irradiance. As applied in industrial photometry, a photometer is the general term covering instruments for detecting:*scattered light intensity *absorption… …
78Latent image — A latent image on photographic film is an invisible image produced by the exposure of the film to light. When the film is developed, the area that was exposed darkens and forms a visible image. In the early days of photography, the nature of the… …
79Audience scanning — An audience watches a laser light show during the SIB trade fair in Rimini, Italy in 2002. Audience scanning (sometimes called crowd scanning ) occurs when a laser beam is directed toward the people observing a laser show or display. Although… …
80Glory (satellite) — The Glory satellite is a planned NASA satellite mission that will collect data on the chemical, micro physical and optical properties and the spatial and temporal distributions of aerosols, and will collect solar irradiance data for the long term …
