key term - Little Boy

Definition

Little Boy was the codename of the first atomic bomb used in warfare, which was detonated over the Japanese city of Hiroshima on August 6, 1945. It was a uranium-based, gun-type fission bomb that demonstrated the devastating power of nuclear weapons and marked a turning point in the history of warfare.

5 Must Know Facts For Your Next Test

1. The Little Boy bomb had a yield of approximately 15 kilotons of TNT, making it one of the most powerful weapons used in World War II.
2. The design of the Little Boy bomb was a gun-type fission weapon, where a subcritical mass of uranium-235 was fired at another subcritical mass, creating a critical mass and initiating the chain reaction.
3. The detonation of the Little Boy bomb over Hiroshima resulted in the immediate deaths of approximately 70,000 people, with many more dying from radiation exposure and the subsequent destruction.
4. The development of the Little Boy bomb was part of the Manhattan Project, a top-secret American research and development program that aimed to create the first nuclear weapons during World War II.
5. The use of the Little Boy bomb, along with the later detonation of the Fat Man bomb over Nagasaki, led to Japan's surrender and the end of World War II.

Review Questions

• Explain the basic mechanism of how the Little Boy atomic bomb worked.
  • The Little Boy atomic bomb was a gun-type fission weapon, where a subcritical mass of uranium-235 was fired at another subcritical mass, creating a critical mass and initiating a chain reaction. This rapid splitting of uranium-235 nuclei released a large amount of energy in the form of heat and radiation, resulting in a powerful explosion with a yield of approximately 15 kilotons of TNT.
• Analyze the historical significance of the Little Boy bomb and its impact on the outcome of World War II.
  • The detonation of the Little Boy bomb over Hiroshima marked a turning point in the history of warfare, as it demonstrated the devastating power of nuclear weapons. The immediate and long-term destruction caused by the bomb, including the deaths of approximately 70,000 people, led to Japan's surrender and the end of World War II. The development of the Little Boy bomb was a major achievement of the Manhattan Project, which represented a significant technological and scientific advancement in the field of nuclear physics. The use of the Little Boy and Fat Man bombs also sparked global discussions and debates about the ethical and moral implications of nuclear weapons.
• Evaluate the lasting impact of the Little Boy bomb on the development and proliferation of nuclear weapons, as well as the ongoing efforts to prevent the use of such weapons.
  • The detonation of the Little Boy bomb over Hiroshima had a profound and lasting impact on the development and proliferation of nuclear weapons. It sparked a global arms race, as nations sought to develop their own nuclear capabilities for both deterrence and potential use. The destructive power of the Little Boy bomb also led to increased efforts to prevent the use of nuclear weapons, including the creation of international treaties and organizations, such as the Nuclear Non-Proliferation Treaty and the International Atomic Energy Agency. However, the threat of nuclear war remains a significant concern, and ongoing efforts to disarm and secure nuclear stockpiles, as well as to promote the peaceful use of nuclear technology, continue to be a major focus of global diplomacy and policymaking.

Related terms

Nuclear Fission:

Nuclear fission is the process of splitting heavy atomic nuclei, such as uranium or plutonium, to release a large amount of energy in the form of heat and radiation.

Nuclear Fusion:

Nuclear fusion is the process of combining light atomic nuclei, such as hydrogen, to form heavier nuclei, releasing a vast amount of energy in the process.

Uranium-235:

Uranium-235 is the fissile isotope of uranium that was used as the primary fuel in the Little Boy atomic bomb.