Old people
Wilhelm Roentgen
What is anything that occupies space and has form or shape?
Matter
Electrons have a __ charge?
Negative
Shorter wave length results in ____ energy.
greater
What is the usual mA range that is set for production of x-rays.
7-15
Who introduced the long-cone paralleling technique?
Dr. F.G. Fitzgerald
Energy is the the capacity to do ___.
Work
What is the smallest particle of a substance that retains the property of the original substance?
Molecule
The three components of the x-ray machine.
Tubehead, Extension Arm, and Control panel.
What produces electrons in the cathode?
Tungsten filament circuit
How long was Otto Walkoff exposed to radiation?
25 minutes
Electrons are contained in the _____s of an atom.
Shells
What is formed when an atom gains or loses an electron?
Ion
What metal surrounds the anode and target?
Copper
Name two parts of the x-ray unit control panel.
The master switch, indicator light, exposure button, control devices/ selector buttons
How many articles did Dr. William Rollins publish?
What is the energy that holds the nucleus together?
Nuclear-binding energy
What causes electrons to destabilize out of their orbits?
X-ray photons
What is caused by drifting of the extension arm during an x-ray?
How many impulses are in a half second?
30
What year was Dr. Kells credited with the first use of radiographs in dentistry?
1896
How many different atoms are known to exist?
112
The primary kind of radiation produced in the dental x-ray tubehead.
Bremsstrahlung Radiation (Braking Radiation)
The average P.I.D. ranges in length from?
8-16 inches
Name the three types of radiation