• Kyodo

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Japanese physicist Akira Tonomura, a fellow at electronics giant Hitachi Ltd. tipped for years as a Nobel Prize contender, died of pancreatic cancer early Wednesday at a hospital in Hidaka, Saitama Prefecture, sources said. He was 70.

Tonomura is known for developing electron holography for observing microscopic structures of matter using the wave nature of electrons and confirming the so-called Aharonov-Bohm effect, whose existence had long been disputed among physicists.

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