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When a -particle of energy 3.5 MeV approaching gold nucleus, it undergoes scattering by 180^@, then distance of closest approach is : |
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Answer» `12.7 xx 10^(-14)m` `r_(0)=(9 xx 10^(9) xx 2 xx 79 xx (1.6 xx 10^(-19))^(2))/(5.5 xx 10^(6) xx 1.6 xx 10^(-19))m`. `=41.4 xx 10^(-15)m` |
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