How Was the Positron Discovered

question 64

Multiple Choice

How was the positron discovered?

• A) By creating them in very high energy collisions of heavy nuclei such as gold nuclei.
• B) By observing the cloud chamber tracks of high energy gamma rays as they created positron- electron pairs.
• C) By observing the cloud chamber tracks of cosmic rays as they passed through a metal plate.
• D) By allowing protons to collide in a particle accelerator.
• E) By allowing electrons to collide in a particle accelerator.

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