Question
In Rutherford scattering experiment, what will be the correct angle for $\alpha $ scattering for an impact parameter $b = 0$.....$^o$
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Answer
Impact parameter $b \propto \cot \frac{\theta }{2}$
Here $b = 0,$ hence $\theta = {180^o}$
Here $b = 0,$ hence $\theta = {180^o}$
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