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Brian Josephson

physical science Maturity 9-11 Next article →

Brian David Josephson is a famous British physicist. He was born on 4 January 1940, in Cardiff, Wales.

cmglee Cambridge Wikimedia Meetup 23 tour Brian Josephson
cmglee Cambridge Wikimedia Meetup 23 tour Brian Josephson

His parents were Abraham Josephson and Mimi Weisbard. He went to Cardiff High School to learn. There, a teacher named Emrys Jones helped him love physics.

Plaque on the Mond Building, Cambridge, for Brian Josephson
Plaque on the Mond Building, Cambridge, for Brian Josephson

Josephson later went to Trinity College at the University of Cambridge. He first studied math but then switched to physics. He was a very bright student at Cambridge. Some teachers said he understood hard ideas very quickly.

In 1962, Josephson made a huge discovery while he was a student. He found something called the Josephson effect. This happens in superconductors, which are special materials. He predicted that a supercurrent could tunnel through a thin barrier. This means electricity flows through a wall even without a voltage drop. He also found that the current would oscillate at a certain frequency.

NISTvoltChip
NISTvoltChip

This discovery was later proven by Philip Anderson and John Rowell. It showed how tiny particles move in ways that seem impossible.

Josephson's work changed how we use technology today. His ideas helped scientists invent SQUIDs. These are superconducting quantum interference devices. They are used in medicine, computing, and geology. In 1980, a company called IBM used his work. They built a computer prototype that was very fast. It could be 10 to 100 times faster than older machines. This showed how his math could make real tools better.

Because of his discovery, Josephson won the Nobel Prize in Physics. He shared the prize in 1973 with Leo Esaki and Ivar Giaever. The prize money was $122,000. He had also won the Hughes Medal and the Holweck Prize. He was a Fellow of the Royal Society in 1970. He served as a Professor of Physics at Cambridge for many years. He retired from that role in 2007.

Later in his career, Josephson looked at new ideas. He practiced Transcendental Meditation starting in the early 1970s. He wanted to study how the mind and nature might connect. He started the Mind–Matter Unification Project at the Cavendish Laboratory. He looked at the link between quantum mechanics and consciousness. This made some other scientists criticize his work. However, he remained a very important figure in the history of science.

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