1. Which of the following discoveries marked the beginning of dental

radiography?

 A. X-rays

 B. Radio waves

 C. Microwaves

 D. Infrared rays

 Answer: A. X-rays

 Rationale: X-rays were discovered by Wilhelm Conrad Roentgen in

1895, leading to the development of dental radiography.

2. What is the primary purpose of dental radiography?

 A. Diagnosis of dental caries

 B. Detection of periodontal disease

 C. Assessment of bone levels

 D. All of the above

 Answer: D. All of the above

 Rationale: Dental radiography is used for various purposes, including

diagnosing dental caries, detecting periodontal disease, and assessing bone

levels.

3. In digital radiography, which of the following is responsible for

converting the x-ray energy into an electronic signal?

 A. Photostimulable phosphor plate

 B. Charge-coupled device

 C. Photodiode

 D. Amorphous silicon detector

 Answer: A. Photostimulable phosphor plate

 Rationale: In digital radiography, the photostimulable phosphor plate

converts x-ray energy into an electronic signal for image capture.

4. Which of the following types of radiation is used in dental radiography?

 A. Alpha particles

 B. Beta particles

 C. Gamma rays

 D. Neutron radiation

 Answer: C. Gamma rays

 Rationale: Gamma rays, a type of electromagnetic radiation, are used in

dental radiography for image production.