§2 Physical Mutation物理诱变 1. Classifications of the Physical mutagens p 186 Light irradiation(X,Y, UV, Laser) Particle irradiation(a, B, neutrons) lonizing irradiation(x, y, a, B, neutrons) Non-ionizing irradiation (UV, Laser 2. Units of Irradiation p 186 Irradiation intensity Irradiation dosage Absorbed dosage§2 Physical Mutation 物理诱变 1. Classifications of the Physical Mutagens p. 186 Light irradiation (X, γ, UV, Laser) Particle irradiation (α，β，neutrons) Ionizing irradiation (X, γ, α，β，neutrons) Non-ionizing irradiation (UV, Laser) 2. Units of Irradiation p. 186 Irradiation intensity Irradiation dosage Absorbed dosage