The British physicist named Paul Dirac was known to have introduced the concept of ______ in 1930.

The correct answer is antiparticle.

Key Points

• The British physicist named Paul Dirac was known to have introduced the concept of antiparticle in 1930.
• The antiparticle is a subatomic particle that has the same mass as an ordinary matter particle but an opposing electric charge and magnetic moment.
• For example, the negatively charged electron's antiparticle is the positron, which has a positive charge.
• Paul Dirac asserted that all matter has an antimatter-like counterpart when he was formulating the quantum mechanical theory. If a particle is charged, it and its antiparticle should have opposing charges.
• Carl Anderson identified a positively charged particle in 1932 by examining the cosmic ray particle trails in a cloud chamber. This particle appeared to have an electron-like mass.
• Anderson's particle, which was given the name "positron", was the first antiparticle to be experimentally proved.

Additional Information

• Atoms are desorbed from a hot surface through a physical process called thermal ionisation, sometimes referred to as surface ionisation or contact ionisation, which results in the creation of ions.
• High-energy charged particles, x-rays, and gamma rays are all components of cosmic radiation, which stars create. The earth receives secondary radiation that is created when charged particles interact with the atmosphere.
• The nuclear model is a term that refers to Rutherford's atomic model. The protons and neutrons, which make up almost all of the mass of the nuclear atom, are found in the nucleus, which lies at the centre of the atom. Since they surround the nucleus, the electrons take up the majority of the atom's volume.