Chen Ning Yang

National Medal of Science

Physical Sciences

For his pathbreaking research in theoretical physics, which he has influenced for many years by his profound questions and deep mathematical insight. His ideas have had great impact not only on theoretical developments but also on experiments in elementary particles and condensed matter.

For his pathbreaking research in theoretical physics, which he has influenced for many years by his profound questions and deep mathematical insight. His ideas have had great impact not only on theoretical developments but also on experiments in elementary particles and condensed matter.

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Birth
September 22, 1922
Age Awarded
64
Country of Birth
China
Key Contributions
Groundbreaking Research In Parity Symmetry
Awarded by
Ronald Wilson Reagan
Education
National Southwestern Associated University
University of Chicago
Accolades
Supported by NSF
Areas of Impact
Theory & Foundations
Affiliations
State University of New York at Stony Brook
Other Prizes
Nobel Prize
N

Nature is highly symmetric – from the structure of a snowflake to the Mickey Mouse-shaped water molecules it contains.

According to the concept of parity, these objects, which mirror each other, must obey the same physical laws.

Chen Ning Yang, a Chinese-American theoretical physicist, helped find an exception to this rule, showing that parity is violated when elementary particles – subatomic components like quarks and leptons – begin to decay.

This concept is called “weak interaction,” a condition that spawns radioactive decay, playing a key role in the fission that powers nuclear plants and weapons.

The discovery won Yang a Nobel Prize in 1957.

“I should like to say that I am as proud of my Chinese heritage and background as I am devoted to modern science, a part of human civilization of Western origin, to which I have dedicated and I shall continue to dedicate my work,” he said, accepting the honor.

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