Ch.21 Introduction to Dental Radiography and Equipment Exam

_____________________was the professor of physics who discovered x-rays.

• Kells

• Roentgen

• Walkoff

• Rollins

_________took the first intraoral radiograph.

• Walkoff

• Roentgen

• Kells

• Rollin

_______________developed the paralleling technique.

• Fitzgerald

• Coolidge

• Rober

• McCormack

The open-ended tube, commonly known as the cone, is called the

• position indicator device (PID)

• Maximum permissible dose (MPD)

• Radiation absorbed dose (rad)

• Roentgen Equivalent man (rem)

In adition to x-rays, other forms of electromagnetic energy include

• radio waves

• television waves

• visible light

• All of the above

___________is the process by which atoms change into negatively or positively charged ions during radiation.

• impulse

• milliamperage

• kilovoltage

• ionization

Which of the following is not a characteristic of short, hard wavelengths?

• High frequency

• Low energy

• High penetrating power

• All of the above

__________________radiation is the central beam that comes from the x-ray tubehead.

• Leakage

• Primary

• Scatter

• Secondary

_____________________radiation forms when the primary x-ray strikes or contacts any type of matter(solid,liquid, or gas)

• Leakage

• Primary

• Schatter

• Secondary

____________radiation deflects from its path as it strikes matter.

• Leakage

• Primary

• Scatter

• Secondary