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This is a list of sources of light, the visible part of the electromagnetic spectrum.Light sources produce photons from another energy source, such as heat, chemical reactions, or conversion of mass or a different frequency of electromagnetic energy, and include light bulbs and stars like the Sun. Reflectors (such as the moon, cat's eyes, and mirrors) do not actually produce the light that ...
Lightning-induced magnetic anomalies can be mapped in the ground, [123] [124] and analysis of magnetized materials can confirm lightning was the source of the magnetization [125] and provide an estimate of the peak current of the lightning discharge. [126]
Global map of lightning frequency--strikes/km 2 /yr. The high lightning areas are on land located in the tropics. Areas with almost no lightning are the Arctic and Antarctic, closely followed by the oceans which have only 0.1 to 1 strikes/km 2 /yr. The map on the right shows that lightning is not distributed evenly around the planet. [5]
Pages in category "Light sources" ... Upper-atmospheric lightning; Z. Zodiacal light This page was last edited on 15 September 2013, at 04:23 ...
Lightning (disambiguation) List of light sources This page was last edited on 20 February 2025, at 12:00 (UTC). Text is available under the Creative Commons ...
Pages in category "Lightning" The following 49 pages are in this category, out of 49 total. This list may not reflect recent changes. ...
There are no actual daylight light sources, only simulators. Constructing a practical light source that emulates a D-series illuminant is a difficult problem. The chromaticity can be replicated simply by taking a well known light source and applying filters, such as the Spectralight III, that used filtered incandescent lamps. [22]
Color temperature for white light sources also affects their use for certain applications. The color temperature of a white light source is the temperature in kelvins of a theoretical black body emitter that most closely matches the spectral characteristics (spectral power distribution) of the lamp. An incandescent bulb has a color temperature ...