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E.O. Lawrence was awarded the 1939 Physics Nobel Prize for invention and development of

1. diode
2. microwave transmitter
3. cyclotron
4. none of these

Correct answer: cyclotron

Solution

E.O. Lawrence is famous for inventing the cyclotron, a compact particle accelerator. This device was central to his Nobel Prize recognition in 1939 for its invention and development.

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