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ENW 7.37 One of the most serious consequences of the thermal radiation from a nuclear explosion is the product of "flash burns" resulting from the absorption of radiant energy by the skin of exposed individuals. In addition, because of the focusing action of the lens of the eye, thermal radiation can cause permanent damage to the eyes of persons who happen to be looking directly at the burst; however, such direct viewing will be fortuitous and rare. What is expected to be a more frequent occurrence and therefore much more important to defensive action, is the temporary loss of visual acuity (flashblindness or dazzle) resulting from the extreme brightness, particularly at night when the eyes have been adapted to the dark. This may be experienced no matter what the direction in which the individual is facing.
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Below, the thermal pulse from a weapon ignites the front of a house on the test site 1 second after detonation. The blast wave will arrive a bit later and totally demolish the structure. Figure 7.28a ENW
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ENW Figure 11.51
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