30 Questions
What does the term 'Bremsstrahlung' mean?
Slowing down or braking
What is the kinetic energy of the ejected electron?
69 keV
What is the energy of characteristic X-rays of Tungsten?
10.18 keV
What determines the energy of bremsstrahlung photons produced?
Distance of the electron from the nucleus
Why do X-ray photons of bremsstrahlung origin have energies as high as the peak kilovoltage?
High energy interactions with nucleus
How does passing the nucleus affect the kinetic energy lost by the electron?
Increases kinetic energy loss
What is the primary function of the focusing cup in an x-ray tube?
To focus the electrons onto the target
What is the relationship between the potential difference and the speed of the projectile electrons?
The potential difference and the speed of electrons are directly proportional
What is the purpose of the high vacuum in an x-ray tube?
To prevent the electrons from colliding with air molecules
What is the primary mechanism by which electrons are decelerated when they hit the target in an x-ray tube?
They transfer their kinetic energy to the target atoms
What is the main factor that determines the kinetic energy of the projectile electrons in an x-ray tube?
The potential difference between the cathode and anode
What is the relationship between the kinetic energy of the projectile electrons and the energy of the x-rays produced in an x-ray tube?
The kinetic energy of the electrons is only partially converted to x-ray energy
What was Wilhelm Conrad Roentgen experimenting on when he discovered X-rays?
Crooke's tube covered with black paper
What did Roentgen notice glowing when the Crookes tube was activated?
Barium platinocyanide
What did Roentgen conclude about the invisible ray that emanated from the Crookes tube?
It penetrated the black paper
When did Roentgen give his preliminary report on X-rays to the president of the Wuerzburg Physical-Medical Society?
December 28, 1895
How did Roentgen's discovery spread to the scientific community?
Through newspapers like the New York Times
Which object was used to illustrate the properties of X-rays in Roentgen's experiment?
His wife's hand
What percentage of the kinetic energy of the electron is converted to heat energy at the anode?
Approximately 99%
What type of interaction occurs when the incident electron interacts with an inner-shell electron and ionizes the atom?
Characteristic interaction
What happens when the projectile electrons interact with the outer-shell electrons but do not transfer sufficient energy to ionize them?
The outer-shell electrons are raised to an excited, or higher, energy level and then immediately drop back to their normal energy with the emission of infrared radiation.
What type of radiation is emitted when electrons transition from a higher energy state to a lower energy state?
X-rays
The kinetic energy of the projectile electron is directly proportional to which two factors?
Mass and velocity
What happens to the mass of an electron as its velocity increases?
The mass of the electron increases
When an incident electron with a kinetic energy of 63 keV leaves the atom with 37 keV, what is the energy of the bremsstrahlung x-ray emitted?
26 keV
What is the relationship between the kinetic energy of the exiting electron and the energy of the bremsstrahlung radiation in the atom interactions?
The kinetic energy of the exiting electron equals the initial kinetic energy minus the energy of bremsstrahlung radiation.
What type of x-rays are those that travel in a different direction after interacting with matter?
Scattered x-rays
In atom interactions, what are leakage x-rays?
X-rays able to penetrate the protective housing of the x-ray tube
What do remnant x-rays refer to in radiography?
X-rays passing through the patient's body without interaction
If a projectile electron initially has a kinetic energy of 85 keV and exits an atom with 59 keV, what is the energy of the bremsstrahlung x-ray emitted?
26 keV
Test your knowledge on the discovery of X-rays by Wilhelm Conrad Roentgen in 1895 while experimenting with Crooke’s tube at the University of Wuerzburg. Learn about the fascinating history behind the creation of X-rays.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
