Madeleine Barnothy Forro (Hungarian: Barnóthy Forró Magdolna; August 21, 1904 – February 1995) was a Hungarian-American physicist and astrophysicist.
Her work included research on cosmic ray physics, gravitational lensing, and the biophysics of magnetic fields.
[1][2] She was awarded a doctorate in physics in 1927 from the Royal Hungarian University in Budapest for work measuring dielectric constants.
[2][3] Her research in the late 1930s observing cosmic rays, helped to reveal the nature of electrons, pions and muons.
[3] The Barnothys struggled to reestablish cosmic ray research after the Second World War and in 1948 they emigrated to the United States, with Forro taking a professorship at Barat College, Illinois.