T
- Tait–Bryan angles (a.k.a. Cardan angles, nautical angles) – Peter Guthrie Tait and George H. Bryan
- Talbot effect – William Henry Fox Talbot
- Taylor cone – Geoffrey Ingram Taylor
- Teller–Ulam design – Edward Teller and Stanisław Ulam
- Tesla effect, oscillation (a.k.a. Vackár oscillation) – Nikola Tesla (and Jirí Vackár)
- Thévenin's theorem – Léon Charles Thévenin
- Thirring effect – see Lense-Thirring effect, above
- Thomas precession – Llewellyn Thomas
- Thomas–Fermi approximation, model – Llewellyn Hilleth Thomas and Enrico Fermi
- Thomson cross-section, effect – William Thomson, 1st Baron Kelvin
- Thorndike's laws (of effect, readiness, and exercise) – Edward L. Thorndike
- Thorson's rule – Gunnar Thorson
- Thouless energy – David J. Thouless
- Thwaites conjecture – see Collatz conjecture, above
- Tiedemann's bodies – Friedrich Tiedemann
- Tiffeneau–Demjanov rearrangement – Marc Tiffeneau and Nikolai Demyanov
- Tobin's q – James Tobin
- Tolman effects – Richard Chace Tolman
- Tolman–Oppenheimer–Volkoff limit – Richard Chace Tolman, J. Robert Oppenheimer, and George Michael Volkoff
- Tonks–Girardeau gas – Lewi Tonks and Marvin D. Girardeau
- Townsend effect (a.k.a. Ramsauer effect, Ramsauer-Townsend effect), ionization coefficient – John Sealy Townsend
- Tricomi's equation – Francesco Giacomo Tricomi
- Troxler's effect/fading – Ignaz Paul Vital Troxler
- Tsytovich effect – Vadim N. Tsytovich
- Tsytovich–Razin effect (a.k.a. Tsytovich–Eidman–Razin effect) – see Razin effect, above
- Tychonoff space – Andrey Nikolayevich Tychonoff
- Tyndall effect/scattering – John Tyndall
Read more about this topic: Scientific Phenomena Named After People