Question
What facts are obtained by the scattering with angle more than $90^{\circ}$.
✓
Answer
(i) For scattering of positively charged $\alpha$-particles with angle more than $90^{\circ}$, it is necessary that positively charge is concentrated at tiny space of atom in gold foil.
(ii) It cannot explain the spectrum of atom.
(ii) It cannot explain the spectrum of atom.
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