Gamma Ray Becomes Electron/positron Pair Photograph by I. Curie & F. Joliot/science Photo Library

Gamma Ray Becomes Electron/positron Pair

by I. Curie & F. Joliot/science Photo Library

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Title

Gamma Ray Becomes Electron/positron Pair

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I. Curie & F. Joliot/science Photo Library

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Photograph - Photograph

Description

Cloud chamber photograph showing the conversion of a gamma ray into an electron-positron pair. Gamma rays do not leave tracks in a cloud chamber because they have no electric charge. But if they have enough energy, they can reveal themselves by converting into matter & antimatter, as in this case. Because they have opposite electric charge, the electron & positron curl away in opposite directions in the cloud chamber's magnetic field. Gamma rays are a very energetic form of light (electromagnetic radiation). They are also one of the 3 types of radiation emitted by radioactive materials. The photo was taken by French physicists Irene Curie & Frederic Joliot.

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September 20th, 2018

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