Understanding the Code Name of the Nagasaki Atomic Bomb

The question asks about the code name given to the atomic bomb deployed by the United States on the Japanese city of Nagasaki during the Second World War. This event was a pivotal moment in history.

During the final stages of World War II, the United States developed and used two atomic bombs against Japan. These bombs were part of a secret research and development undertaking known as the Manhattan Project.

The two bombs were dropped on different cities and had distinct code names and designs:

• The first bomb was dropped on Hiroshima on August 6, 1945.
• The second bomb was dropped on Nagasaki on August 9, 1945.

Let's look at the code names associated with these historic weapons:

• The bomb dropped on Hiroshima was a uranium-based fission device. Its code name was Little Boy.
• The bomb dropped on Nagasaki was a plutonium-based implosion device. Its code name was Fat Man.

Based on this historical information, the code name of the bomb dropped on Nagasaki was Fat Man.

Comparing the Hiroshima and Nagasaki Bombs

It's helpful to compare the two atomic bombs used in 1945:

Historical Significance of the Nagasaki Bombing

The bombing of Nagasaki, three days after the bombing of Hiroshima, contributed significantly to Japan's decision to surrender, effectively ending World War II. The choice of Nagasaki as a target was secondary; the primary target was Kokura, but weather conditions led the B-29 bomber, Bockscar, to divert to Nagasaki.

The impact of the Fat Man bomb on Nagasaki was devastating, causing immense destruction and loss of life. The long-term effects, including radiation sickness, continued for years.

Revision Table: World War II Atomic Bombings

Additional Information: The Manhattan Project and Atomic Bombs

The development of the atomic bombs used in 1945 was the result of the top-secret Manhattan Project, a United States-led effort during World War II. It involved significant scientific and engineering resources.

• The project developed two main types of fission bombs: a uranium-based gun-type assembly (used in Little Boy) and a plutonium-based implosion-type assembly (used in Fat Man).
• The implosion design (Fat Man) was considered more efficient for plutonium and was tested successfully at the Trinity test site in New Mexico on July 16, 1945, before being used on Nagasaki.
• The gun-type design (Little Boy) was simpler and was not fully tested before its use on Hiroshima.

Understanding the details surrounding the bombings of Hiroshima and Nagasaki, including the code names Little Boy and Fat Man, is crucial for studying the end of World War II and the dawn of the nuclear age.