RT 102: Radiation Production and Characteristics

Comprehensive practice flashcards covering radiation physics fundamentals, mechanics, standard units of measurement, and atomic structure based on RT 102 lecture notes.

What is the definition of radiation according to the transcript?

The transfer of energy through space

How is physics defined in the context of Radiation Physics?

A branch of Science that deals with the nature, properties, and interaction of matter and energy.

What is matter?

Anything that occupies space and has mass; the material substance of which physical objects are composed.

What are the fundamental, complex building blocks of matter?

Atoms and molecules

Contrast the units of measurement for weight and mass.

Mass is measured in kilograms ($kg$), while Weight is measured in Newtons ($N$).

How is weight calculated using mass and gravity?

$$\text{Weight} = \text{mass} \times \text{gravity}$$

What is energy?

The ability to do work.

What unit is often used for energy in the field of Radiology?

The electron volt ($eV$).

What type of energy is the most important for x-ray imaging?

Electromagnetic energy

State Albert Einstein's Theory of Relativity equation and define its components.

$E = mc^2$, where $E$ is energy, $m$ is mass, and $c$ is the velocity (speed) of light in a vacuum.

What is the value for the speed of light ($c$)?

$$3 \times 10^8\,m/s$$

Name the three Base Quantities of measurement.

Length, Mass, and Time.

How is one meter currently defined?

The distance travelled by light in $1/299,792,468$ second.

What element is used in an atomic clock to measure time?

Cesium (based on the vibration of cesium atoms).

What is the defining equation for Momentum ($p$)?

$$p = mv$$

State Newton's First Law of Motion.

Inertia: A body will remain at rest or will continue to move with constant velocity in a straight line unless acted on by an external force.

What is the formula for Force ($F$) according to Newton's Second Law?

$$F = ma$$

What does the Law of Conservation of Energy state?

Energy may be transformed from one form to another, but it cannot be created or destroyed.

Define Air Kerma ($Gy_a$).

The kinetic energy transferred from photons to electrons during ionization or excitation; it is equivalent to $1\,J/kg$.

What is the SI unit for Radioactive material quantity?

Becquerel ($Bq$).

What is the definition of one Becquerel ($Bq$)?

The quantity of radioactivity in which a nucleus disintegrates every second ($1\,dps = 1\,Bq$).

What is the Atomic Mass Number ($A$)?

The number of protons plus the number of neutrons in the nucleus.

What are the three fundamental subatomic particles?

Protons, Neutrons, and Electrons.

What formula calculates the maximum number of electrons that can exist in an orbital shell?

Pauli Exclusion Formula: $2n^2$, where $n$ is the shell number.

What is the Octet Rule?

No outer shell can contain more than eight electrons.

Differentiate between Centripetal Force and Centrifugal Force in an atom.

Centripetal force is the center-seeking attraction between electrons and the nucleus, while centrifugal force is the outward force that balances it.

What is Electron Binding Energy ($E_b$)?

The strength of attachment of an electron to the nucleus; the energy required to completely remove an electron from an atom.