ASTRON 2B03 Lecture Notes - Lecture 6: Special Relativity, Strong Gravity, Quantum Cryptography

• School: McMaster University
• Department: Astronomy
• Course: ASTRON 2B03
• Professor: Laura Parker

Document Summary

But (cid:449)he(cid:374) (cid:455)ou (cid:271)ou(cid:374)(cid:272)e so(cid:373)ethi(cid:374)g off it, (cid:455)ou (cid:373)o(cid:448)e it. Cannot measure position and momentum (mass of something x velocity) precisely. If one makes a very precise measurement of the position of an object, its momentum (and speed) are uncertain. A very precise measurement of the speed an object means that its position is unknown. A particle does not simultaneously have both position and momentum (or velocity), since any measurement of the one necessarily disturbs the other. Ca(cid:374)"t tell (cid:449)hi(cid:272)h slit the parti(cid:272)le uses (cid:271)e(cid:272)ause parti(cid:272)les do (cid:374)ot si(cid:373)ulta(cid:374)eousl(cid:455) ha(cid:448)e (cid:271)oth position and momentum (or velocity) Always some uncertainty in every measurement, this means everything is probabilistic. Quantum particles can behave like particles (photoelectric effect) or waves (two-slits) The observer can affect the outcome of the experiment. Given some energy, i can create mass. A particle and its antiparticle (called matter and antimatter) E. g. an electron and a positron: a proton and an antiproton. Electron negative charge, positron positive charge.