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A beam of 9 MeV α particles scatters from a gold foil of thickness 0.5 µm....

A beam of 9 MeV α particles scatters from a gold foil of thickness 0.5 µm.

(a) What fraction of the α particles is scattered between 1° and 2°?

(b) What is the ratio of α particles scattered through angles greater than 2° to the number scattered through angles greater than 20°?

(c) What is the ratio of α particles scattered through angles greater than 3° to the number scattered through angles greater than 90°?

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