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cse • paper_2 • quantum_mechanicscse-2026-subject-05-010

Quantum wavefunction — UPSC CSE 2026 Physics PYQ

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A particle of mass m is in the ground state of a 1-D box of infinite potential of length a. If the length of the box is changed to 2a symmetrically without disturbing the wave function of the particle, find the probability that the particle will be in the ground state of the new box.

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