Which one of the following pairs is not correctly matched:a)Discovery of Meson - Hideki Yukawab)Discovery of Positron - C.D. Anderson and U.F. Hessc)Theory of energy production in the sun and stars - H.A. Bethed)Synthesis of transuranic elements - Enrico Fermi transuranic elementsCorrect answer is option 'D'. Can you explain this answer?

Question

Which one of the following pairs is not correctly matched:a)Discovery of Meson                        - Hideki Yukawab)Discovery of Positron                        - C.D. Anderson and U.F. Hessc)Theory of energy production in the sun and stars  - H.A. Bethed)Synthesis of transuranic elements              -  Enrico Fermi transuranic elementsCorrect answer is option 'D'. Can you explain this answer?

Answer

Discovery of Meson - Hideki Yukawa:
Hideki Yukawa, a Japanese physicist, proposed the existence of mesons in 1935. He theorized that mesons, which are subatomic particles, could mediate the strong nuclear force. His work was based on the idea that the strong force, which holds atomic nuclei together, required a carrier particle. Yukawa's prediction of the meson was later confirmed experimentally, leading to his Nobel Prize in Physics in 1949. Therefore, the pair 'Discovery of Meson - Hideki Yukawa' is correctly matched.

Discovery of Positron - C.D. Anderson and U.F. Hess:
The discovery of the positron, an antimatter particle with the same mass as an electron but with a positive charge, is credited to Carl D. Anderson. In 1932, Anderson observed the presence of positively charged particles in cosmic rays, which behaved like electrons but curved in the opposite direction in a magnetic field. He named these particles positrons. The contribution of Ugo Fano Hess, mentioned in the pair, is unclear. Therefore, the pair 'Discovery of Positron - C.D. Anderson and U.F. Hess' is correctly matched.

Theory of energy production in the sun and stars - H.A. Bethe:
Hans Albrecht Bethe, an American physicist, developed the theory of energy production in the sun and stars. In the 1930s, Bethe proposed the proton-proton chain reaction as the primary mechanism for the fusion of hydrogen nuclei into helium in the sun. This theory explained the source of the sun's energy and revolutionized our understanding of stellar evolution. Bethe's work earned him the Nobel Prize in Physics in 1967. Therefore, the pair 'Theory of energy production in the sun and stars - H.A. Bethe' is correctly matched.

Synthesis of transuranic elements - Enrico Fermi:
The synthesis of transuranic elements, which are elements with atomic numbers greater than uranium, is not correctly matched with Enrico Fermi. Transuranic elements were first synthesized by a team of scientists led by Glenn T. Seaborg, not Enrico Fermi. In the 1940s, Seaborg and his colleagues bombarded uranium with neutrons, leading to the discovery of transuranic elements such as neptunium, plutonium, and americium. Enrico Fermi, on the other hand, is known for his contributions to nuclear physics, including the development of the first nuclear reactor. Therefore, the pair 'Synthesis of transuranic elements - Enrico Fermi' is not correctly matched.

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