Question

Write a short note on the meson theory of nuclear forces

Answer 1

Answer:

In 1935 Japanese scientist H.Yukawa explained the mechanism of interaction of the elementary particles(Neutrons & Protons) in a nucleus. In order to explain his theory he considered a particle known as pions/mesons(π°) and that came to be known as Meson theory.

A pion has two sub particles such as π- & π+.

He explained,A neutron in a nucleus emits out a π-particle and becomes a proton.where as a proton emits a π+ and becomes a neutron,this exchange of particles continues repeatedly.

A Visualisation of reaction-

N+π- →p

P+π+ →N

Due to this exchange of particles there is a strong interactive force existing inside the nucleus.

---Hope you got what you wanted

Answer 2

They bind protons and neutrons (“nucleons”) into atomic nuclei. .

The original idea was that the force is caused by the exchange of particles lighter than nucleons known as mesons.

This idea gave rise to the birth of a new sub-field of modern physics, namely, (elementary) particle physics.

HOPE this helps ☺️