Albert einstein for kids atomic bomb
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From E=mc² to the atomic bomb
The subtle connections between Einstein&#;s formula, nuclear fission and nuclear fusion
An article by Markus Pössel
When Einstein&#;s most famous formula E=mc² is mentioned, the atomic bomb is usually not far behind. Indeed there is a connection between the two, but it is subtle, and sadly, some popular science texts get it wrong: they will tell you that a nuclear explosion is &#;caused by the transformation of matter and energy&#; according to Einstein&#;s formula, and that the gigantic conversion factor c2 is responsible for the immense power of such weapons.
Ten seconds after the ignition of the first atomic bomb, New Mexico, July 16, [Image: Los Alamos National Laboratory]
But first things first. Let&#;s have a look at what Einstein really did say about the relation between mass and energy.
Equivalence or transformation?
For Einstein, mass (more precisely: relativistic mass; the property that determines how difficult it is to change a body&#;s speed or its direction of motion) and energy are simply two different names for one and the same physical quantity. Whenever a system has an energy E, it automatically has the relativistic mass m=E/c2; whenever a system has the mass m, you need to assign it an energy E=mc2. Once the mass
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Einstein and the Bomb
EINSTEIN AND THE BOMB combines documentary footage and staged dramatizations of Einstein's life, based on his own words from speeches, letters, and interviews, to draw a portrait of the scientist in exile during Hitler's rise to power and eventual fall. During a little-known period of exile in the British countryside, where Einstein (played in the reenactments by Irish actor Aidan McArdle) was guarded by two rifle-wielding young women, the scientist considered his own role as a public figure, a Jew, and a militant pacifist. Concluding that organized force can only be opposed by organized force, Einstein begins speaking out publicly against Nazism and rising antisemitism, and he eventually plays a role in encouraging the US to pursue the creation of an atom bomb before Hitler does. The US, of course, did create the bomb and dropped it on Hiroshima and Nagasaki, Japan to put a definitive end to the war, an event that haunted Einstein, for his role in it, until his final days.
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Hiroshima and Nagasaki
Atomic Bomb
Background
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