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Physics · Glossary

What is The four interactions?

Also known as: fundamental interaction · gravitation · electromagnetic interaction

Definition 13.2 High School Physics · Chapter 13 — The Fundamental Interactions

A fundamental interaction is a force not reducible to other forces; there are exactly four: gravitation, the electromagnetic interaction, the strong interaction and the weak interaction.

The ladder of structure on a powers-of-ten axis: forty-four decades separate the quark from the observable universe. Sizes in metres.
The ladder of structure on a powers-of-ten axis: forty-four decades separate the quark from the observable universe. Sizes in metres.
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