Padmanabhan, T.2012-03-022012-03-021985-11-06http://hdl.handle.net/11007/125The role played by general relativity in quantum mechanics (especially as regards the uncertainty principle) is investigated. It is confirmed that the validity of time-energy uncertainty does depend on gravitational time dilation. We also show that there exists an intrinsic lower bound to the accuracy with which acceleration due to gravity can be measured. The motion of equivalence principle in quantum mechanics is clarified.enGeneral relativityUncertainty principleActive gravitational massGravitational accelerationArticle