optical lever मीनिंग इन हिंदी

Early seismometers used optical levers or mechanical linkages to amplify the small motions involved, recording on soot-covered paper or photographic paper.
Various methods of detection can be used, e . g . interferometry, optical levers, the piezoresistive method, the piezoelectric method, and STM-based detectors ( see section " AFM cantilever deflection measurement " . ).