CHEM 1A Lecture Notes - Lecture 6: Uncertainty Principle, Matter Wave

• School: UC-Irvine
• Department: Chemistry
• Course: CHEM 1A
• Professor: Amanda Brindley

Document Summary

= delta(v) = 8. 112 x 10^ (-38) m/s p = m*delta(v) delta(x) = 0. 5m position m = 1300 kg mass delta(v) = ? velocity. We can t know both the momentum and position of a particle w/ exact certainty. Momentum = mass x velocity (p = m * v) Uncertainty of momentum decreases => your measurements of position will increase // vice versa. Uncertainty in position increases when uncertainty in velocity decreases. Debroglie wavelength - describing matter as a wave lambda = h / p (h = plank s constant // v = particle s velocity, not frequency) lambda = h / mv. Ke = 2. 56 x 10^ (-27) j lambda = h / mv. Ke = 0. 5m(v^2) v = (2ke/ m) ^ (0. 5) v = 74. 94 m /s. Ex. why can t we see waves of macroscopic matter? baseball = 0. 145kg // moves = 27 m/s lambda = h / mv.