How close did a 5.5 MeV alpha particle get to a gold nucleus?
AAbout 4.0 x 10^-14 m
BAbout 1.2 x 10^-15 m
CAbout 5.3 x 10^-11 m
DAbout 2.3 x 10^-17 m
Answer & Solution
Correct answer: A. About 4.0 x 10^-14 m
Geiger and Marsden's data gave a closest approach of about 4.0 x 10^-14 m, an upper limit on the nuclear size.
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