In Rutherford scattering experiment, what will b ethe correct angle for `alpha` scattering for an impact parameter `b = 0` ?

Explanation

We know that impact parameter, b`propcot.(theta)/(2)rArr`
`b=K cot. (theta)/(2)`
where, K is a constant
Here, if, b=0
`" " Kcot theta//2=0rArrcot theta//2=0rArr(theta)/(2)=(pi)/(2)`
Hence, `" " theta=pi=180^(@)`