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The Cosmic Background Explorer (COBE / ˈ k oʊ b i / KOH-bee), also referred to as Explorer 66, was a NASA satellite dedicated to cosmology, which operated from 1989 to 1993.Its goals were to investigate the cosmic microwave background radiation (CMB or CMBR) of the universe and provide measurements that would help shape our understanding of the cosmos.
This problem was called the "ultraviolet catastrophe and infrared catastrophe". [75] 1892: Willem Henri Julius published infrared spectra of 20 organic compounds measured with a bolometer in units of angular displacement. [76] 1901: Max Planck published the blackbody equation and theorem. He solved the problem by quantizing the allowable energy ...
The depth of penetration depends on the frequency of the microwaves and the tissue type. The Active Denial System ("pain ray") is a less-lethal directed energy weapon that employs a microwave beam at 95 GHz; a two-second burst of the 95 GHz focused beam heats the skin to a temperature of 130 °F (54 °C) at a depth of 1/64th of an inch (0.4 mm) and is claimed to cause skin pain without lasting ...
A 6-foot-11 center, Åžengün joined the Rockets as the 16th pick of the 2021 NBA Draft out of Turkey. He signed a four-year, $15.5 million contract as a rookie.
If black holes evaporate via Hawking radiation, a solar mass black hole will evaporate (beginning once the temperature of the cosmic microwave background drops below that of the black hole) over a period of 10 64 years. [152] A supermassive black hole with a mass of 10 11 M ☉ will evaporate in around 2×10 100 years. [153]
The core of the traditional radio frequency atomic clock is a tunable microwave cavity containing a gas. In a hydrogen maser clock the gas emits microwaves (the gas mases) on a hyperfine transition, the field in the cavity oscillates, and the cavity is tuned for maximum microwave amplitude. Alternatively, in a caesium or rubidium clock, the ...
A scientific review by German and Luxembourgian NGOs shows that electromagnetic radiation – such as mobile phone and Wi-Fi radiation – likely has a negative impact on, declining, insects, with 72 of 83 analyzed studies finding an effect. [264] [265]
Projection of the Kardashev scale to 2040 based on data from the International Energy Agency World Energy Outlook. Kardashev presented for the first time a classification of civilizations according to the level of the rate of their energy consumption, or ability to harness power, in an article entitled Transmission of Information by Extraterrestrial Civilizations, published in 1964 first in ...
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