Which term describes substances that do not permit x-rays to pass through and appear white on the film?

Which term describes substances that do not permit x-rays to pass through and appear white on the film?

• A. Radiopaque
• B. Radiolucent
• C. Acute Radiation Exposure
• D. Bitewing

Answer: (A)

When an X-ray is taken, how much a material blocks the X-ray beam determines how it looks on the film. Substances that do not allow X-rays to pass through are radiopaque, so they show up as white or very light areas because they stop more of the X-ray photons. Dense materials like metals and dense structures such as enamel and bone are radiopaque. In contrast, substances that let X-rays pass through easily are radiolucent and appear darker on the film. The other terms here aren’t about how a material interacts with X-rays: a bitewing is just a type of dental X-ray image, and acute radiation exposure refers to the dose of radiation received, not to how a material appears on an X-ray.

When an X-ray is taken, how much a material blocks the X-ray beam determines how it looks on the film. Substances that do not allow X-rays to pass through are radiopaque, so they show up as white or very light areas because they stop more of the X-ray photons. Dense materials like metals and dense structures such as enamel and bone are radiopaque. In contrast, substances that let X-rays pass through easily are radiolucent and appear darker on the film. The other terms here aren’t about how a material interacts with X-rays: a bitewing is just a type of dental X-ray image, and acute radiation exposure refers to the dose of radiation received, not to how a material appears on an X-ray.