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9 thoughts on “ Cosmic Background Radiation

  1. Feb 17,  · CMB is radiation that is a remnant of the tremendous heat of the universe’s infancy. This heat did not let atoms form in the earlier stages, so they .
  2. Cosmic microwave background (CMB), also called cosmic background radiation, electromagnetic radiation filling the universe that is a residual effect of the big bang billion years ago. Because the expanding universe has cooled since this primordial explosion, the background radiation is in the microwave region of the electromagnetic spectrum.
  3. electromagnetic radiation coming from every direction in the universe, considered the remnant of the big bang and corresponding to the black-body radiation of 3 K, the temperature to which the universe has cooled Also called: cosmic microwave background Most material © , , by Penguin Random House LLC.
  4. Cosmic radiation from the sun, our galaxy, and beyond is constantly around us and contributes to natural background radiation. Altitude and latitude can also influence the level of background radiation at any one site. All rocks and soils contain some trace amount of natural radioactivity and can sometimes be ingested or inhaled if disturbed.
  5. Apr 12,  · Gamow calculated the intensity of this remnant radiation to be equal to the radiation from a body kept at a temperature of approximately 3 °K (– °C, – °F). This radiation has since been called the cosmic microwave background (CMB).
  6. 3K Background Radiation A uniform background radiation in the microwave region of the spectrum is observed in all directions in the sky. Currently it is commonly called the Cosmic Microwave Background or just CMB, alluding to its Wien peak in the microwave region. It shows the wavelength dependence of a "blackbody" radiator at about 3 Kelvins temperature.
  7. Given the measured radiation temperature of K, the energy density of the cosmic microwave background can be shown to be about 1, times smaller than the average rest-energy density of ordinary matter in the universe. Thus, the current universe is matter-dominated.
  8. Aug 24,  · The cosmic microwave background (CMB) is thought to be leftover radiation from the Big Bang, or the time when the universe began. As the theory goes, when the universe was born it underwent a rapid.
  9. So ubiquitous is this cosmic microwave background radiation that, even though each cubic centimeter contains just photons of it, in total it makes up 99% of all the photons in the universe (the remaining 1% being in starlight).

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