物理因素 紫外线 Visible light 88§ 画8高 Radio waves Microwaves Infrared Gamma Cosmic X rays rays rays 10°m 10nm 10°nm 103nm 1 nm 10-nm 10nm Wavelength (1m) lonizing radiation Lowest Energy level Highest Copynight o 1997, by John wiley Sons, Inc. Ag rights reserved一、物理因素 ◼ 紫外线