 Solution

ID: past-exam-of-the-mathematics-course-of-the-university-of-cambridge/2020/ii/paper-1/10c/iii/solution

Codex  0 Created 2026-09-24 Updated 2026-09-29

The Pauli multiplication relations and

∣ n ∣ = 1

give

A^{2} = (n \cdot σ)^{2} = I .

Therefore the possible measurement outcomes, the eigenvalues of

A

, are

+ 1 and - 1 .

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