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  • Answer the following questions, which help you understand the difference between Thomson' s model and Rutherford's model better. (c) ) Keeping other factors fixed, it is found experimentally that for small thickness t, the number of

Q 12.11  (c)   Answer the following questions, which help you understand the difference between Thomson’s model and Rutherford’s model better.

  Keeping other factors fixed, it is found experimentally that for small thickness t, the number of \alpha-particles scattered at moderate angles is proportional to t. What clue does this linear dependence on t provide?

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Scattering at moderate angles requires head-on collision the probability of which increases with the number of target atoms in the path of \alpha-particles which increases linearly with the thickness of the gold foil and therefore the linear dependence between the number of \alpha-particles scattered at a moderate angle and the thickness t of the gold foil.

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