L
- Lagrangian mechanics, Lagrange points – Joseph Louis Lagrange
- Lamb shift – Willis Lamb
- Lambert's cosine law (a.k.a. Lambert's emission law) – Johann Heinrich Lambert
- Landau damping, pole – Lev Davidovich Landau
- Landau–Pomeranchuk–Migdal effect – Lev Davidovich Landau, Isaak Pomeranchuk, and Arkady Migdal
- Landau–Zener transition – Lev Davidovich Landau and Clarence Zener
- Landé g-factor – Alfred Landé
- Langmuir probe – Irving Langmuir
- Langmuir–Blodgett film – Irving Langmuir and Katharine B. Blodgett
- Laplace vector – see Laplace–Runge–Lenz vector, below
- Laplace–Runge–Lenz vector (a.k.a. LRL vector, Laplace vector, Runge–Lenz vector, Lenz vector) – Pierre-Simon de Laplace, Carl Runge and Wilhelm Lenz
- Larmor frequency, precession, radius – Sir Joseph Larmor
- Larsen effect – Søren Larsen (scientist)
- Laspeyres index – Ernst Louis Etienne Laspeyres
- Leavitt's law (a.k.a. Henrietta's law) – Henrietta Swan Leavitt
- Le Chatelier's principle – Henri Louis Le Chatelier
- Lee distance – C. Y. Lee
- Lee-Smith algorithm – William C. Y. Lee and H. L. Smith
- Leidenfrost effect, point – Johann Gottlob Leidenfrost
- Lenard effect – Philipp Eduard Anton von Lenard
- Lennard-Jones potential – John Lennard-Jones
- Lense–Thirring effect (a.k.a. Thirring effect) – Josef Lense and Hans Thirring
- Lenz vector – see Laplace–Runge–Lenz vector, above
- Lenz's law – Heinrich Friedrich Emil Lenz
- Levenshtein distance, automaton – Vladimir Levenshtein
- Levi-Civita symbol – Tullio Levi-Civita
- Lewis–Mogridge Position – David Lewis and Martin J. H. Mogridge
- Little–Parks effect – William A. Little and Roland D. Parks
- Littlewood–Offord problem – John E. Littlewood and A. Cyril Offord
- Locard's exchange principle – Edmond Locard
- Lombard effect – Étienne Lombard
- London force – Fritz London
- Lorentz force, transformation – Hendrik Antoon Lorentz
- Lorentz–Lorenz equation – Hendrik Antoon Lorentz and Ludvig Lorenz
- Lorenz attractor – Edward Norton Lorenz
- Lorenz curve – Max O. Lorenz
- Lorenz gauge condition – Ludvig Lorenz
- Lorenz–Mie scattering – see Mie scattering, below
- Loschmidt's paradox – Johann Loschmidt
- Lotka's law – Alfred J. Lotka
- Lotka–Volterra equation – Alfred J. Lotka and Vito Volterra
- Love waves – Augustus Edward Hough Love
- Lucas critique – Robert Lucas, Jr.
- Lyapunov's central limit theorem, equation, exponent, fractal, function, stability, test, time and tube – Aleksandr Mikhailovich Lyapunov
- Lyman line, series – Theodore Lyman
Read more about this topic: Scientific Phenomena Named After People