The Stand-Up Physicist: Time Reversal and Spin

4,577 views · Published 10 November 2007 · 29:13 · Indexed 18 October 2026

Channel: Doug Sweetser · 2007 · Science & Technology

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Part of the Stand-Up Physicist series, half hour chats by Doug Sweetser about his theoretical physics research. The laws of physics, mathematically, don't care about the direction of time, yet our experience has a clear arrow. By shifting the question a bit, it becomes reasonable to expect a direction to the arrow of spacetime, because space has a handedness. Half-integer spin appears as a mystery, unless you look at a beer can in a new way.

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