Final answer:
X-rays are the type of electromagnetic waves used for Radiographic Testing due to their ability to penetrate materials and reveal internal structures without causing damage.
Step-by-step explanation:
The type of electromagnetic waves commonly used for Radiographic Testing is X-rays. X-rays have the ability to penetrate various materials, including body tissue and metals, making them extremely useful for medical imaging and industrial non-destructive testing. They have shorter wavelengths than microwaves, which results in higher frequency and energy levels. This property allows X-rays to reveal the internal structure of objects by creating an image on photographic film or a digital sensor as they pass through different materials with varying degrees of absorption. In the electromagnetic spectrum, X-rays fall between ultraviolet radiation and gamma rays in terms of frequency and energy.
It is important to understand that radiography leverages the higher energy of X-rays to inspect the integrity of materials and structures without causing damage to the object being inspected, which is why this type of electromagnetic radiation is selected for such applications.