Millikan oil-drop experiment

Millikan oil-drop experiment

[′mil·ə·kən ′ȯil‚dräp ik‚sper·əmənt]
(atomic physics)
A method of determining the charge on an electron, in which one measures the terminal velocities of rise and fall of oil droplets in an electric field after the droplets have picked up charge from ionization in the surrounding gas produced by an x-ray beam.
References in periodicals archive ?
44 The Millikan oil-drop experiment was the first to make what important measurement?