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GOES-16's Geostationary Lightning Mapper (GLM) is the first operational lightning mapper flown in geostationary orbit. The spacecraft also includes four other scientific instruments for monitoring space weather and the Sun. GOES-16's design and instrumentation began in 1999 and was intended to fill key NOAA satellite requirements published that ...
GOES-17 (designated pre-launch as GOES-S) is an environmental satellite operated by the National Oceanic and Atmospheric Administration (NOAA). The satellite is second in the four-satellite GOES-R series (GOES-16, -17, - T, and - U). GOES-17 supports the Geostationary Operational Environmental Satellite (GOES) system, providing multi-spectral ...
The Balmer series, or Balmer lines in atomic physics, is one of a set of six named series describing the spectral line emissions of the hydrogen atom. The Balmer series is calculated using the Balmer formula, an empirical equation discovered by Johann Balmer in 1885. The visible spectrum of light from hydrogen displays four wavelengths, 410 nm ...
Third cranial nerve palsy: This dangerous condition that can make one pupil dilate. It’s often caused by pressure on one of the nerves that control eye movements. If you also have a headache and ...
Photopsia definition. Photopsias are defined as an effect on the vision that causes appearances of anomalies in the vision. Photopsias usually appear as: flickering lights. shimmering lights ...
The wet form of age-related macular degeneration (wet AMD) can start suddenly. You won’t feel pain, but you might notice problems with your eyesight. At first, you may simply notice blurred or ...
Acute glaucoma: A sudden onset of severe throbbing eye pain, headaches, blurred vision, rainbow halos around lights, red eyes, nausea, and vomiting. It’s a medical emergency. Secondary glaucoma ...
The visible spectrum is the band of the electromagnetic spectrum that is visible to the human eye. Electromagnetic radiation in this range of wavelengths is called visible light (or simply light). The optical spectrum is sometimes considered to be the same as the visible spectrum, but some authors define the term more broadly, to include the ...