Ephraim Fischbach

Ephraim Fischbach is emeritus professor of physics at Purdue University. His career spans theoretical and experimental work in fundamental interactions, neutrino physics, and unconventional tests of gravity and nuclear decay. He was a researcher at Niels Bohr Institute and Stony Brook before joining Purdue in 1979, retiring in 2024. He’s well known for studying “fifth force” effects, reanalyzing the Eötvös experiment, and exploring whether solar neutrinos influence beta decay. His work also extended into the Casimir effect and neutrino detection.