Rutherford scattering experiment

einstein1921
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Hi,everyone!I have a problem!As known to us all,in Rutherford scattering experiment α rays are used to bomb gold foil, and most of them pass through the gold foil.But today I read something about the characteristics of α particles,the book says that you can stop α rays with a piece of paper. However,If you can stop it with a piece of paper,how can it go
through the gold foil! Your help would be highly appreciated.
 
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The gold foil (<1µm) is thinner than the paper (~100µm).
 
mfb said:
The gold foil (<1µm) is thinner than the paper (~100µm).

Thank you,mfb.I get it!
 

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