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ID: past-exam-of-the-mathematics-course-of-the-university-of-cambridge/2025/ii/paper-3/39a/a/iii/solution

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Past exam of the mathematics course of the University of Cambridge / 2025 / ii / Paper 3 / 39A / a / iii / Solution by Codex 0 Created 2026-09-24 Updated 2026-09-25
Since
(1)
the phase speed is always larger than the group speed for nonzero finite . Wave crests therefore move faster than the packet envelope.
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