p45_042 - 42. We note from track 1, and the quantum numbers...

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Unformatted text preview: 42. We note from track 1, and the quantum numbers of the original particle ( A ), that positively charged particles move in counterclockwise curved paths, and by inference negatively charged ones move along clockwise arcs. This immediately shows that tracks 1, 2, 4, 6, and 7 belong to positively charged particles, and tracks 5, 8 and 9 belong to negatively charged ones. Looking at the fictitious particles in the table (and noting that each appears in the cloud chamber once [or not at all]), we see that this observation (about charged particle motion) greatly narrows the possibilities: tracks 2 , 4 , 6 , 7 particles C,F,H,J tracks 5 , 8 , 9 particles D,E,G This tells us, too, that the particle that does not appear at all is either B or I (since only one neutral particle appears). By charge conservation, tracks 2, 4 and 6 are made by particles with a single unit of positive charge (note that track 5 is made by one with a single unit of negative charge), which implies (by...
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