An atomic bomb is an uncontrolled nuclear fission device that releases large amounts of energy through chain reactions of uranium or plutonium. The development, known as the Manhattan Project, began in 1939 with contributions from prominent scientists like Einstein. There are two main types of bombs: 'Little Boy' which used uranium-235 and operated on a gun-type mechanism, and 'Fat Man' which used plutonium-239 and operated on an implosion-type mechanism, both causing devastating environmental effects.

1. ATOMIC BOMB
By : P.Bonehoeffer10/30/2018 1

2. WHAT IS AN ATOMIC BOMB?
 An uncontrolled nuclear fission device(fission
of the nuclei of Uranium or Plutonium in a
chain reaction) that release large amount of
energy.
10/30/2018 2

3. WHO CREATED THE ATOMIC BOMB
• Its known as MANHATTAN Project.
• Einstein and other scientists were involved in
purify U-235 for the purpose of an atomic
bomb
• Development of the atomic bomb began in
1939.
10/30/2018 3

4. Working principle
• Atoms bombs work on fission reactions.
• When fission occurs
 ENERGY IS PRODUCED
NEUTRONS ARE RELEASED
10/30/2018 4

5. Little boy
• The fissile material was uranium 235 .
• It was a gun type bomb that used an explosive device
to slam one portion of uranium into the other.
• once the two pieces of uranium are brought together,
the initiator introduces a burst of neutrons and the
chain reaction began.
10/30/2018 5

6. Fat man
 The fissile material was plutonium 239
 the plutonium was divided into subcritical portions and packed into a
spherical case . To cause the chain reaction , gunpowder around the case
was used to force the unit center.
 Thus , it was called as an “ implosion type “ bomb
10/30/2018 6

7. 10/30/2018 7

8. Effects to environment
• The initial blast creates a blinding flash,
followed by temperatures in the area of the
explosion reaching upwards of 10 million
degrees Celsius.
• Gamma rays and X rays released from atomic
explosions.
• Due to this radiations genetic changes in
human causes many diseases about decades.
10/30/2018 8

9. 10/30/2018 9