During a nuclear explosion, Uranium 238 fissions in one millionth of a second and emanates a temperature of 10 million degrees. This is characterized by a blue flash very rich in ultraviolets. Then this temperature decreases rapidly with the dispersion of energy that turns the flash from blue to reds and infrareds.

This characteristic flash is the visual signature of high-energy weapons in the same way as the large atomic mushroom cloud.

Understanding the physical mechanisms at the origin of the effect assures its faithful reproduction.

Indeed, spectators make no mistake, at the sight of the flash, they know that they’re in the presence of a nuclear explosion, the arrival of the atomic mushroom cloud only comforts their conviction.

Nuke_1.mov
QT(3.5Mo)

Cascade.mov
QT(2Mo)