 # Who proposed the theory of Feynman diagram

The theory of the Feynman diagram is proposed and invented by American physicist Richard Feynman (1918 – 1988). He introduced to the world his diagram in 1948 and for the path-breaking work he received the Noble Prize.

Richard was among one of the world’s top 10 scientists by a poll conducted in the year 1999. He was a member of the team which invented the first atomic bomb of the Modern world and also the panel member of the team which investigated the space shuttle challenger disaster.

Richard Feynman is recognised for his work on quantum electrodynamics, which describes how light interacts with matter and how charged particles interact with each other. He also showed diagrams of how particles interact (now called Feynman diagrams) and a quantum mechanical explanation of liquid helium’s superfluid behaviour.

### What is Feynman Diagrams?

Feynman diagram is a graphical method of representing the interactions of elementary particles. Feynman diagrams are now applied to depict all types of particle interactions. According to Richard, these diagrams can be used in quantum Physics and in solid-state theory.

• A Feynman diagram is a two-dimensional representation in which one axis, usually the horizontal axis, is chosen to represent space, while the second (vertical) axis represents time. For representing the complex equation governing the interaction of the subatomic particle, Feynman Diagrams are used.
• The Feynman Diagram gives a visual explanation of the complex scientific representation. The Feynman Diagrams have been shown as the space diagrams with space as one axis and time as another.
• The space axis is the right axis as shown and the time axis is upward axis. Moreover, the space axis is similar to the x-axis and the time axis is similar to the y-axis of the Cartesian coordinate system.
• Straight lines are used to describe fermions—fundamental particles with half-integer values of intrinsic angular momentum (spin), such as electrons (e)—and wavy lines are used for bosons—particles with integer values of spin, such as photons (γ). (1) (0)