A Brief History of Time

A Brief History of Time

Weak nuclear force Term Analysis

One of the four main forces, this is the nuclear force relating to radioactivity and particles of spin ½, which means they look the same only after two turns.
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Weak nuclear force Term Timeline in A Brief History of Time

The timeline below shows where the term Weak nuclear force appears in A Brief History of Time. The colored dots and icons indicate which themes are associated with that appearance.
Chapter 5
The Search for a Unifying Theory of the Universe Theme Icon
Human Curiosity and Ingenuity Theme Icon
The third force is the weak nuclear force . It creates radioactivity and acts on matter particles, but not force-carrying ones. Abdus Salam... (full context)
The Search for a Unifying Theory of the Universe Theme Icon
Human Curiosity and Ingenuity Theme Icon
...at some high energy, the strong nuclear force would be weakened, and the electromagnetic and weak nuclear force would strengthen, so that all three would be equal. In this theory, they could thus... (full context)
Human Curiosity and Ingenuity Theme Icon
In 1956, Tsung-Dao Lee and Chen Ning Yang found the weak nuclear force does not obey symmetry P. This was proven true by Chien-Shiung Wu, who caused radioactive... (full context)
The Search for a Unifying Theory of the Universe Theme Icon
Human Curiosity and Ingenuity Theme Icon
The weak nuclear force also does not obey the symmetry C, meaning it would cause a universe of anti-particles... (full context)
Chapter 8
The Search for a Unifying Theory of the Universe Theme Icon
Human Curiosity and Ingenuity Theme Icon
...inflationary idea states that while expanding rapidly, particles had enough energy for the strong and weak nuclear forces and electromagnetic force to be unified in a single force. As the universe cooled, these... (full context)
Human Curiosity and Ingenuity Theme Icon
...does eventually freeze, so would the symmetry eventually break between the strong nuclear force, the weak nuclear force , and the electromagnetic force. This would bring the universe back to the slower rate... (full context)