An `alpha`-particle having kinetic energy 5 MeV falls on a Cu-foil. The shortest distance from the nucleus of Cu to which `alpha`- particle reaches is (Atomic no. of Cu=29,`K=9xx10^(9)Nm^(2)//C^(2)`)
A
`2.35xx10^(-13)` m
B
`1.67xx10^(-14)` m
C
`5.98xx10^(-15)` m
D
none of these
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