What fraction of a beam of 7.7-MeV alpha particles incident upon a gold foil 3.0×10-7 m thick is scattered by less than 1°?()


What fraction of a beam of 7.7-MeV alpha particles incident upon a gold foil 3.0×10-7 m thick is scattered by less than 1°?()

A.1.35

B.0.67

C.0.05

D.0.84

正确答案:0.84


Tag:原子物理 时间:2024-01-03 15:10:08