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Damage from the Heat Ray
The temperature at the center of the fireball generated by the atomic bomb at the moment of detonation was more than 1 million degrees Celcius. One second later, the fireball had grown to its maximum diameter of 280 meters. The fierce heat ray emitted from that fireball raised surface temperatures at the hypocenter to 3,000°C to 4000°C. (The surface temperature of the sun is 5,700°C; iron melts at 1500°C.)
| A Schoolgirl with Burns August 10, 1945 Those exposed to the ferocious heat ray sustained serious burns. Skin exposed directly to the heat ray (with nothing to shield it) within roughly 1.2 kilometers of the hypocenter was burned to black char. Even internal organs were affected. Virtually everyone burned in this way died immediately or within a few days. |
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Photo: Hajime
Miyatake
Courtesy: Asahi Shimbun All rights reserved by the Asahi Shimbun. |
A man burned by the heat ray except where his waistband covered him
August 7, 1945
This man exposed within a kilometer of the hypocenter was critically burned over his whole body except where his waistband covered him.
| This woman's kimono pattern was
burned into her skin. Around August 15, 1945 Because dark colors absorb heat more readily than light colors, the heat ray burned the dark parts of this woman's kimono pattern into her skin. |
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Photo: Gon-ichi
Kimura
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| Road imprinted with the shadow of the bridge
railing Around November 1945 The heat ray scorched and blackened the asphalt, but it remained white where the bridge railing blocked the rays. |
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| Photo: US Army |
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