According to Yukawa’s theory of nuclear forces, the origin of nuclear force between nucleons is due to the exchange of:

  1. mesons
  2. photons
  3. electrons
  4. None of these

Answer (Detailed Solution Below)

Option 1 : mesons
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Detailed Solution

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CONCEPT:

Yukawa’s theory of nuclear forces

  • A little over 50 years ago, Hideki Yukawa, a young Japanese theoretical physicist at the University of Osaka, proposed a fundamental theory of nuclear forces involving the exchange of massive charged particles between neutrons and protons.
  • He called the exchanged particles “heavy quanta” to distinguish them from the light quanta of the electromagnetic field, but now they are known as pions,  the lightest members of a large family of particles called mesons.

EXPLANATION:

  • According to Yukawa’s theory of nuclear forces, the origin of nuclear force between nucleons is due to the exchange of mesons.
  • Hence, option 1 is correct.
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