Explosion: Atomic

: Using conventional high-explosive "lenses" to compress a plutonium core, increasing its density until it becomes supercritical (used in the "Fat Man" bomb and the Trinity test). Physical Effects of the Detonation

When a nuclear weapon detonates, its energy is released in several distinct forms: atomic explosion

An atomic (fission) explosion occurs when the nuclei of heavy, unstable atoms—typically or Plutonium-239 —are split into smaller parts. This process, known as nuclear fission , releases a massive amount of energy due to the "nuclear difference," where nuclear reactions release roughly a million times more energy than chemical reactions. : Using conventional high-explosive "lenses" to compress a

: Shooting one piece of uranium into another to create a supercritical mass (used in the "Little Boy" bomb). : Shooting one piece of uranium into another

The Devastating Effects of Nuclear Weapons - The MIT Press Reader

To trigger this explosion, the fissile material must reach a , where a self-sustaining chain reaction occurs. In modern designs, this is often achieved through:

The following overview summarizes the scientific principles, historical context, and immediate physical effects of an atomic explosion.