From Heisenberg uncertainty principle, ∆x⋅∆p≥‌
h
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.....(i) or ∆x⋅m∆v≥‌
h
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or ∆x⋅∆v≥‌
h
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....(ii) This principle is also applicable for pairs like energy-time (∆E⋅∆t) and angular moment - angle (∆w⋅∆θ) along with position-moment (∆x⋅∆p) Thus, ∆E⋅∆t≥