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CSE · Paper II · Quantum Mechanicscse-2026-subject-05-002

Quantum wavefunction (Question 1 (5 Marks)) — UPSC Physics Optional CSE 2026 Paper II

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The wave function of a spin \frac{1}{2} particle is given by \begin{pmatrix} -i \\ 2 \end{pmatrix}. What is the probability of finding the particle in the spin-up state?

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