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