Which type of radiation is most commonly used in radiographic testing?

The most commonly used types of radiation in radiographic testing are X-rays and gamma rays due to their ability to penetrate materials and provide detailed images of internal structures. X-rays are generated by machines and are widely utilized for various applications in industrial and medical fields. They are effective at detecting flaws such as cracks, voids, and other structural anomalies in materials by creating contrast between the different densities encountered.

Gamma rays, on the other hand, are emitted from radioactive isotopes and also serve a similar purpose in radiographic testing. They have higher energy than X-rays and can be utilized in specific situations where greater penetration is required or where the convenience of using isotopes is advantageous.

In contrast, ultraviolet rays, infrared radiation, and radio waves are not suitable for this type of testing. Ultraviolet rays are more commonly used for processes like fluorescent examination, while infrared radiation is generally used for thermal imaging rather than for testing material integrity. Radio waves are primarily utilized in communication technologies and do not have the necessary penetrating capability to assist in radiographic testing.