cse • paper_2 • nuclear_particlecse-2026-subject-07-003
Rest mass — UPSC CSE 2026 Physics PYQ
Buy PYQ Solution Manual →A nucleus of rest mass M is initially in an excited state whose energy is \Delta E above its ground state. The nucleus emits a \gamma-ray of energy h\nu and makes a transition to its ground state. Calculate the fractional change in energy for the nucleus.
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