1.感光作用 同可见光一样，X射线能使胶片感光。当X射线照射到胶片上的溴化银时，能使银粒子.沉淀而使胶片产生“感光作用”。胶片感光的强弱与X射线量成正比。当X射线通过人体时，因人体各组织的密度不同，对X射线量的吸收不同，致绽胶片上所获得的感光度不同，从而获得X射线的影像。这就是应用X射线作摄片检查的基础。
1. Photosensitivity is the same as visible light. X-ray can sensitize film. When X-ray irradiates silver bromide on the film, silver particles can be precipitated and the film can be "sensitized". The sensitivity of the film is proportional to the amount of X-ray. When X-ray passes through the human body, because of the different density of human tissues and the different absorption of X-ray quantity, the sensitivities obtained on the blooming film are different, so the X-ray image can be obtained. This is the basis of X-ray photography.
2.着色作用 某些物质如铂氰化钡、铅玻璃、水晶等，经X射线长期照射后，其结晶体脱水而改变颜色，这就叫做着色作用。
2. Coloration of some substances, such as barium platinum cyanide, lead glass, crystal, etc., after long-term X-ray irradiation, the crystal dehydrates and changes color, which is called coloration.