Question

The positron is discovered by:
(A) Pauling
(B) Anderson
(C) Yukawa
(D) Segar

Answer 1

Hint : In the given question, we are required to elaborate about the discovery of positrons in the scientific world. A positron is the antiparticle counterpart of an electron. When a positron collides with an electron, annihilation occurs.

Complete Step By Step Answer:
The positron is a subatomic particle having the same mass and magnitude of charge as the electron and also constitutes an antiparticle counterpart of a negative electron. The charge of a positron is opposite in nature to that of an electron. Positrons were discovered by Carl David Anderson in $1932$ in the chamber studies of the composition of cosmic rays.
The positron has an electric charge of $+ e$, a spin of $\dfrac{1}{2}$, that is exactly the same as an electron, and has the same mass as an electron.
So, the positron was discovered by Anderson.
Hence, the option (B) is the correct answer.

Note :
Positron is represented by the symbol $e^+$. The two main processes of production of positrons are radioactive decay and pair production. There are many other subatomic particles such as protons, electrons, neutrons, neutrinos, etc. We must go through the discoveries of all these subatomic particles in order to deal with these kinds of questions. One must have a keen interest and the apt knowledge required in the field and domain of history of science and subatomic particles in order to crack such types of questions that require us to dig deeper into the topic.