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Jim Faller, 1955 IU physics undergraduate and world expert in gravitational measurements, deceased

Wednesday, November 15, 2023

James E. Faller Optica

 Jim Faller, one of the most scientifically distinguished of IU physics undergraduates, passed away in summer 2023. After graduating from IU in 1955, Faller joined the legendary gravity group of R. H. Dicke at Princeton, where Faller conceived of a way to measure the Earth-Moon distance using highly-polished mirrors assembled into a corner cube retroreflector. This idea was adopted by the Apollo program, and the measurements it enables have been used to conduct high precision tests of general relativity. The picture shows his device as it was carried onto the lunar surface.

Faller made major contributions to many other precision measurements of gravity, including one of the best measurements of Newton’s gravitational constant G. More detailed info on his work can be found at:

 

James E. Faller Obituary - Optica

Remembering James E. Faller - JILA Fellows

aldrin_cropped.jpg
Astronaut Edwin E. Aldrin, Jr. carries the lunar seismometer and the laser reflector experiments toward a level spot on the lunar surface (1969). State Archives of Florida
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