2013
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6 de jun. de 2024 · Gamma-ray photons are between 10,000 and 10,000,000 times more energetic than the photons of visible light when they originate from radioactive atomic nuclei. Gamma rays with a million million times higher energy make up a very small part of the cosmic rays that reach Earth from supernovae or from other galaxies .
- Gamma-Ray Bursts
gamma-ray burst, an intense, nonrepeating flash of...
- Gamma-Ray Bursts
Hace 3 días · In gamma-ray astronomy, gamma-ray bursts (GRBs) are immensely energetic explosions that have been observed in distant galaxies, being the brightest and most extreme explosive events in the entire universe, as NASA describes the bursts as the "most powerful class of explosions in the universe".
Hace 6 días · gamma-ray burst, an intense, nonrepeating flash of high-energy gamma rays that appears unpredictably at arbitrary points in the sky at a rate of about one per day and typically last only seconds. First discovered in the 1960s, these powerfully luminous events long remained completely mysterious, since there seemed no evidence of their sources ...
6 de jun. de 2024 · Learn more about protecting yourself from radiation: U.S. Centers for Disease Control and Prevention, Emergency Preparedness and Response: Radiation Emergencies. U.S. Department of Homeland Security (DHS) and the Federal Emergency Management Agency (FEMA), Ready.gov.
6 de jun. de 2024 · electromagnetic radiation, in classical physics, the flow of energy at the universal speed of light through free space or through a material medium in the form of the electric and magnetic fields that make up electromagnetic waves such as radio waves, visible light, and gamma rays.
Hace 4 días · Ionising radiation, such as gamma rays, X-rays and radioactive particles can cause cancer by damaging DNA. However, how this happens, or how many tumours are caused by radiation damage has not been known.
Hace 3 días · At X-ray and gamma ray energies above 30 keV, the Crab Nebula is generally the brightest persistent gamma-ray source in the sky, with measured flux extending to above 10 TeV. The nebula's radiation allows detailed study of celestial bodies that occult it.
