Little Boy

Definition

Little Boy was the codename for the atomic bomb that was dropped on Hiroshima, Japan, on August 6, 1945. This bomb marked a pivotal moment in World War II and the beginning of the nuclear age, showcasing the destructive power of nuclear weapons and raising ethical questions about their use in warfare.

5 Must Know Facts For Your Next Test

1. Little Boy was a uranium-based bomb that utilized the gun-type design, where two sub-critical masses of uranium-235 were brought together to initiate a nuclear chain reaction.
2. The explosion from Little Boy resulted in an estimated 70,000 to 80,000 immediate deaths in Hiroshima, with tens of thousands more dying later from radiation exposure.
3. The bomb dropped on Hiroshima had an explosive yield equivalent to approximately 15 kilotons of TNT, devastating approximately five square miles of the city.
4. The decision to use Little Boy was made by President Harry S. Truman in hopes of hastening Japan's surrender and avoiding a costly invasion of the Japanese mainland.
5. The aftermath of Little Boy raised profound moral questions about the use of atomic weapons and led to ongoing debates regarding military ethics and civilian casualties in wartime.

Review Questions

• How did the design and mechanism of Little Boy differ from other atomic bombs developed during the Manhattan Project?
  • Little Boy utilized a gun-type design that brought together two sub-critical masses of uranium-235 to achieve a nuclear explosion. This method contrasted with other designs developed during the Manhattan Project, such as Fat Man, which used implosion to compress plutonium-239 into a supercritical mass. The difference in design reflected varying approaches to achieving critical mass and showcased advancements in nuclear weapon technology.
• Discuss the impact of the bombing of Hiroshima with Little Boy on international relations in the immediate post-war period.
  • The bombing of Hiroshima with Little Boy had significant implications for international relations after World War II. It marked the first use of nuclear weapons in warfare, establishing the United States as a dominant military power and prompting fears among other nations regarding nuclear capabilities. This event contributed to an arms race during the Cold War, as countries sought to develop their own nuclear arsenals to deter aggression and secure their national interests.
• Evaluate the ethical considerations surrounding the use of Little Boy and its implications for future military engagements involving nuclear weapons.
  • The use of Little Boy raises complex ethical considerations regarding the morality of using atomic bombs against civilian populations. The massive loss of life and long-term suffering caused by radiation exposure led to intense debates about whether such actions were justified to end the war quickly. These discussions have continued to influence policies on nuclear engagement, deterrence strategies, and arms control agreements, shaping how nations approach warfare in an era where nuclear weapons are a reality.

Related terms

Fat Man: Fat Man was the codename for the atomic bomb dropped on Nagasaki, Japan, three days after Little Boy. It used plutonium as its fissile material and was a different design than Little Boy.

Manhattan Project: The Manhattan Project was a secret U.S. government research program that developed the first nuclear weapons during World War II, leading to the creation of both Little Boy and Fat Man.

Nuclear Proliferation: Nuclear proliferation refers to the spread of nuclear weapons and technology, which became a significant global concern after the bombings of Hiroshima and Nagasaki.