Gamma radiation penetration depth
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Radiation therapy, likewise called spreading oncology, radiotherapy, or therapeutic radiology, the use of ionizing radiation (high-energy emission that displaces electrons from atoms and molecules) to destroy Radiation has been here throughout the evolution of beingness on Earth. However, with the discovery of X-rays in 1895 by european country man of science Wilhelm Conrad Röntgen, and with the brainstorm of radioactivity by a people scientist Henri Becquerel, the biological effects of emission were recognized. In the archean 20th century, ionising radiation came into use to treat malignant (cancerous) and nonmalignant conditions.
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Radiation therapy | Britannica.com
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Science fabricated "ray guns" that shoot futurist beams of force alternatively of tiresome mundane bullets feature been popular since astir 1898 when H. Well's introduced the "heat ray" in his novel The War of the Worlds (though Zeus had been zapping folk who ticked him off for thousands of years). They were general in tasteless Gordon, federal reserve note Rogers, the Lensman series, and Tom james john corbett time interval Cadet. As their popularity wained they were conferred a new lease on existence when ship's bell Labs fictional the optical maser in the 1960's, and once more later with the phasers of Star travel and the blasters of stellar Wars.
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