![]() ![]() ![]() Energy from the explosion can be seen traveling down the detonation tower's guy-wires. In the photographs of the explosions, look for tiny Joshua trees at the bottom of a few photographs to garner a sense of the enormity of the explosion that melted the sand and vaporized steel towers. A magnetic field was created around two polarized lenses that were rotated, permitting light to pass through an optical system. The exposure time was so small that no conventional mechanical shutter could be used. Exposure time was one-hundred-millionth of a second. The dangers of shockwaves and radiation required the camera to be placed 7 miles from the detonation site on a tower some 75 feet in the air. Capturing the earliest moments of atomic explosions was exceptionally challenging, in part because of the extraordinary light intensity (an atomic explosion is about a hundred times as bright as the sun) and the ultra-short duration of the phenomena. (Edgerton, Germeshausen and Grier Inc.) developed the rapatronic camera for the Atomic Energy Commission to record - specifically, in one take only - the beginning of nuclear explosions. Hurlbert/Smithsonian's National Musuem of American HistoryĪfter the war, EG & G, Inc. (U.S.High-speed rapatronic camera, manufactured by Edgerton, Germeshausen and Grier Inc. The five-year death total may have reached or even exceeded 200,000, as cancer and other long-term effects took hold. By the end of 1945, because of the lingering effects of radioactive fallout and other after effects, the Hiroshima death toll was probably over 100,000. This included about twenty American airmen being held as prisoners in the city. Some 70,000 people probably died as a result of initial blast, heat, and radiation effects. No one will ever know for certain how many died as a result of the attack on Hiroshima. The yield of the explosion was later estimated at 15 kilotons (the equivalent of 15,000 tons of TNT). boiling up, mushrooming, terrible and incredibly tall,” Tibbets recalled. “The city was hidden by that awful cloud. After a secondEnola Gay returning from Hiroshima mission, Tinian Field, Augshock wave (reflected from the ground) hit the plane, the crew looked back at Hiroshima. At first, Tibbets thought he was taking flak. Though already eleven and a half miles away, the Enola Gay was rocked by the blast. Forty-three seconds later, a huge explosion lit the morning sky as Little Boy detonated 1,900 feet above the city, directly over a parade field where soldiers of the Japanese Second Army were doing calisthenics. Tibbets immediately dove away to avoid the anticipated shock wave. Hiroshima time the Enola Gay released “Little Boy,” its 9,700-pound uranium gun-type bomb, over the city. The bomber, piloted by the commander of the 509th Composite Group, Colonel Paul Tibbets, flew at low altitude on automatic pilot before climbing to 31,000 feet as it neared the target area. Hiroshima had a civilian population of almost 300,000 and was an important military center, containing about 43,000 soldiers. The bomber’s primary target was the city of Hiroshima, located on the deltas of southwestern Honshu Island facing the Inland Sea. In the early morning hours of August 6, 1945, a B-29 bomber named Enola Gay took off from the island of Tinian and headed north by northwest toward Japan. Digital Replica Edition Home Page Close Menu
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