Black shadows of humans and objects, like bicycles, were found scattered across the sidewalks and buildings of Hiroshima and Nagasaki, two of the largest cities in Japan, in the wake of the atomic blast detonated over each city on Aug. 6 and 9, 1945, respectively.
In other words, those eerie shadows are actually how the sidewalk or building looked, more or less, before the nuclear blast. It's just that the rest of the surfaces were bleached, making the regularly colored area look like a dark shadow. Powered by fissionThe intense energy released during an atomic explosion is the result of nuclear fission. According to the Atomic Heritage Foundation, a nonprofit based in Washington, D.C.
Energy flows as photon waves of varying lengths, including in long waves, like radio waves, and in shortwaves, like X-rays and gamma-rays. Between long waves and shortwaves lie visible wavelengths that contain energy that our eyes perceive as colors. However, unlike energy with longer waves, gamma radiation is destructive to the human body because it can pass through clothing and skin, causing ionizations, or the loss of electrons, that damage tissue and DNA, according to Columbia University.
Fat Man and Little BoyOn Aug. 6, 1945, an atomic bomb nicknamed Little Boy detonated 1,900 feet above Hiroshima, Japan's seventh-largest city. According to the World Nuclear Association, the explosion was equivalent to 16,000 tons of TNT exploding, which sent a pulse of thermal energy rippling across the city. The pulse flattened 5 square miles of the city. Almost one-quarter of the population of Hiroshima died immediately.
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