The term radiopaque applies to those substances that X-rays whereas radiolucent refers to substances that X-rays.?

The term radiopaque applies to those substances that block X-rays, making them appear white or light on an X-ray image, such as bone or certain types of contrast media. In contrast, radiolucent refers to substances that allow X-rays to pass through, resulting in a darker appearance on the X-ray, such as soft tissues or air-filled cavities.