What `alpha`-rays strikea thin gold foil then

In the Rutherford’s experiment of alpha particles scattering on thin gold foil, in 1911, it was found that only ion alpha -particle among, 20,000 was deflected through 180^@ . This was due to

In Rutherford's gold foil experiment most of the alpha -particles pass through the gold foil without any deviation from their paths . This indicates that

Why is a very thin gold foil used in the alpha scattering experiment?

alpha - particles are incident on a thin gold foil. For what angle of deviation will the number of deflected alpha -particles be minimum ?