Trouton-Noble experiment

Trouton-Noble experiment

[¦trü·tən ′nō·bəl ik′sper·ə·mənt]
(electromagnetism)
An experiment to detect ether drift by measuring the deflection of a charged parallel plate capacitor which is suspended so that it is free to turn.
(relativity)
An experiment to measure the torque acting on a suspended, charged parallel-plate capacitor; the observed absence of the torque supports the special theory of relativity.