(a) In the case of scattering of alpha particles by a gold foil, average angle of deflection of alpha particles stated by Rutherford’s model is (less than, almost the same as, much greater than) stated by Thomson’s model.

(b) Is the likelihood of reverse scattering (i.e., dispersing of α-particles at points more prominent than 90°) anticipated by Thomson’s model ( considerably less, about the same, or much  more prominent ) than that anticipated by Rutherford’s model?

(c) For a small thickness T, keeping other factors constant, it has been found that amount of alpha particles scattered at direct angles is proportional to T. This linear dependence implies?

(d) To calculate average angle of scattering of alpha particles by thin gold foil, which model states its wrong to skip multiple scattering?

Answer –

• almost the same as

In both the Rutherford’s model and the Thompson’s model, average angle was considered for experimentation. So on these grounds, it can be established that the normal point of diversion of alpha particles in Thomson’s model is about the same as in the case of Rutherford’s model

 (b) much less           

In Rutherford’s model , back/reverse scattering is more likely to happen. Reverse-scattering refers to the scattering of alpha particles at points more than 90°. The chances of back scattering anticipated by Thomson’s model is considerably less than that that of Rutherford’s model.

(c) Single collisions give rise to the dispersing phenomenon. The probability of a single collision is directly proportional to the amount of target molecules. And since the number of target particles increase with an expansion in thickness, the impact likelihood depends directly on the thickness of the objective.

(d) Thomson’s model

Multiple scattering in Thomson’s model should not be disregarded in order to figure out the average scattering angle of alpha particles by a thin gold film. This can be established on the grounds that almost no deflection is caused by a solitary collision in this model. Subsequently by considering multiple scattering, the watched normal scattering edge can be clarified.