The document discusses the history and workings of atomic bombs. It notes that atomic bombs work through nuclear fission, which was discovered and developed into weapons during World War II under the Manhattan Project led by American physicist J. Robert Oppenheimer. The first atomic bomb was tested at Alamogordo, New Mexico in 1945. Two atomic bombs were then used against Japan in 1945 - "Little Boy" dropped on Hiroshima and "Fat Man" dropped on Nagasaki, causing widespread destruction and loss of life. The document outlines the effects of atomic bombs and some basic properties of the two bombs used against Japan.

1. Presenting By:
CH. Rajesh,
V. Maneesh.

3. What is an Atom Bomb?
 Powerful explosive nuclear
weapon fueled by the
splitting, or fission, of the
nuclei of uranium or
plutonium in a chain reaction

4. Who Created the Atomic Bomb ?
Named the Manhattan Project.
The leader of the Manhattan Project was
U.S. Army Brigadier General Leslie R.
Groves.
His team worked under the direction of
American physicist J. Robert Oppenheimer.
Development of the atomic bomb began in
1939.

5. Working Principle
NUCLEAR CHAIN REACTIONS
Fission
Fusion
Atom Bombs work on FISSION reaction

6. NNUUCCLLEEAARR
FFIISSSSIIOONN  Nuclear fission is the splitting of one heavy
nucleus into two or more smaller nuclei, some
sub-atomic particles, and energy.
 A heavy nucleus is usually unstable
due to many positive protons pushing apart.
 Small changes of mass = huge changes in energy
 When fission occurs:
 Energy is produced.
 Neutrons are released.

7. Nuclear Fission
A nuclear chain reaction
May be triggered by a
Single neutron.

8. Nuclear fission is what occurs
in nuclear power plants and
atomic bombs

9. First ATOM BOMB test
 The first atomic explosion was conducted, as
a test, at Alamogordo, New Mexico, on July
16, 1945.
 The energy from the explosion was equivalent
to that of 20,000 tons of TNT.
 It was dropped for testing purposes only.
 Maximum at 500 kilotons of TNT.

10. Atom Bomb Types
Little Boy
WWII brought the first use of the atomic bomb for
military action.
The bomb, nicknamed “Little Boy,” was dropped on
Hiroshima, Japan, on August 6th, 1945.
Even though it was a smaller atomic bomb, it still
managed to kill over 65,000 people, and injure almost
70,000.
The total area of destruction was one mile in diameter.

11.  10 feet (3 m) in length,
 28 inches (71 cm) wide and
 weighed 8,900 lb (4000 kg).
 The energy released is equal to the 15000 tons of
TNT

12. Effects of “Little Boy” on Hiroshima, Japan

13. Hiroshima, Japan: Before The Atomic Bomb

14. Hiroshima, Japan: After the Atomic Bomb

15. Fat Man
The second Atomic bomb, nicknamed
“Fat Man,” dropped for military purposes
during WWII.
It was dropped on August 9th, 1945, in
Nagasaki, Japan.
39,000 people were killed, and 25,000
were injured.

16. Fat Man
7 feet 8 inches (2.34 m) long.
 Five feet (1.52 m) in diameter.
 Weighed 10,200 pounds (4,630 kg).
 Energy is equal to 22000 tons of TNT.

17. Effects of “Fat Man” On Nagasaki, Japan

18. Nagasaki, Japan: Before The Atom Bomb

19. Nagasaki, Japan: After The Atomic Bomb

21. Atom Bomb Destruction

23. Applications
These are used in Defense Academy.
Nearly 40+ countries are active in
preparation of
Atom Bombs
Atom Bomb was used in World War II
against Japan, it took nearly 6 years to
prepare.

24. Ef f ects to
Environment
Due to the Atom Bomb explosion plants
get the side effect of incapable growth
because of two reasons.
Gamma rays and x-rays released from
Atomic Explosions.
Due to this radiations genetic changes
in human causes many diseases about a
decades.

25. the manhattan project trinity test.mp4

26. Special Thanks To:
Prakash Sir,
Pradeep Sir.
By
M2 Section