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Nuclear fission is best explained by :
A
Liquid droplet theory
B
Yukawa $\pi$-meson theory
C
Independent particle model of the nucleus
D
Proton-proton cycle
Detailed Solution
The liquid drop model (Bohr and Wheeler) treats the nucleus like a drop of incompressible liquid, held together by short-range nuclear forces (like surface tension) and pushed apart by Coulomb repulsion.
When a neutron is absorbed, the nucleus is excited and starts to oscillate; it becomes elongated and dumbbell shaped, and the Coulomb repulsion between the two lobes splits it into two fragments.
So nuclear fission is best explained by the liquid drop model.
(Yukawa's theory explains nuclear forces, and the proton-proton cycle is a fusion process.)
When a neutron is absorbed, the nucleus is excited and starts to oscillate; it becomes elongated and dumbbell shaped, and the Coulomb repulsion between the two lobes splits it into two fragments.
So nuclear fission is best explained by the liquid drop model.
(Yukawa's theory explains nuclear forces, and the proton-proton cycle is a fusion process.)