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1813 National Heat and Light Company formed by Frederick Albert Winsor. 1815 Humphry Davy invents the miner's safety lamp. 1823 Johann Wolfgang Döbereiner invents the Döbereiner's lamp. 1835 James Bowman Lindsay demonstrates a light bulb based electric lighting system to the citizens of Dundee.
Evolution is a light which illuminates all facts, a curve that all lines must follow. (p. 219 of The Phenomenon of Man) The phrase "nothing in biology makes sense except in the light of evolution" has come into common use by those opposing creationism or its variant called intelligent design.
The mechanism of light creation is through a suborbital photophore that utilizes gland cells which produce exergonic chemical reactions that produce light with a longer, red wavelength. [74] The dragonfish species which produce the red light also produce blue light in photophore on the dorsal area. [ 74 ]
Both his biblical commentary, the Hexaemeron (1230 x 35), and his scientific On Light (1235 x 40), took their inspiration from Genesis 1:3, "God said, let there be light", and described the subsequent process of creation as a natural physical process arising from the generative power of an expanding (and contracting) sphere of light. [25]
The chronology of the universe describes the history and future of the universe according to Big Bang cosmology.. Research published in 2015 estimates the earliest stages of the universe's existence as taking place 13.8 billion years ago, with an uncertainty of around 21 million years at the 68% confidence level.
Time evolution of light element abundances during Big Bang nucleosynthesis. Using Big Bang models, it is possible to calculate the expected concentration of the isotopes helium-4 (4 He), helium-3 (3 He), deuterium (2 H), and lithium-7 (7 Li) in the universe as ratios to the amount of ordinary hydrogen. [38]
Scientists have discovered a 246 million-year-old marine reptile fossil, the oldest of its kind to be found in the Southern Hemisphere, shining a new light on the early evolution of marine mammals.
Light, visible light, or visible radiation is electromagnetic radiation that can be perceived by the human eye. [1] Visible light spans the visible spectrum and is usually defined as having wavelengths in the range of 400–700 nanometres (nm), corresponding to frequencies of 750–420 terahertz .