In 1932, who discovered the positron, a particle described as ‘carrying a positive charge but having a mass of the same order of magnitude as that normally possessed by a free negative electron’?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. Carl Anderson.
In 1932, the positron was discovered by physicist Carl Anderson. He observed this particle, which carries a positive charge and has a mass equivalent to that of a free negative electron, while studying cosmic rays using a cloud chamber. Anderson’s discovery provided crucial evidence for the existence of antimatter and confirmed the theoretical prediction made by Paul Dirac. For this groundbreaking work, Anderson was awarded the Nobel Prize in Physics in 1936.