A 5.0-MeV alpha particle approaches a gold nucleus with an impact parameter of 2.6×10-13 m.Through what angle will it be scattered？（）

A 5.0-MeV alpha particle approaches a gold nucleus with an impact parameter of 2.6×10-13 m.Through what angle will it be scattered？（）
A.10°
B.Plasma physics
C.Astrophysics
D.Environment
正确答案：10°