Roland Eotvos
Vásárosnaményi Báró Eötvös Loránd, better known as Roland Eötvös (July 27, 1848 - April 8, 1919) was a Hungarian physicist.
Eötvös is remembered today for his experimental work on gravity,
in particular his study of the equivalence of gravitational and inertial mass (the so-called weak equivalence principle) and his study of the gravitational gradient on the Earth's surface.
The weak equivalence principle plays a prominent role in relativity theory,
while measurements of the gravitational gradient are important in applied geophysics, such as the location of petroleum deposits.
