RADIOLOGY PHYSICS CORE EXAMS SET 2026/2027
QUESTIONS AND SOLUTIONS RATED A+
✔✔What is the purpose of lead markers - ✔✔Indicate which side of the body the X-ray
is being taken on
✔✔Examples of immobilization devices - ✔✔Octagonal immobilization
Pig-o-stat for babies
✔✔What are calipers? - ✔✔Tool used for body measurement.
Determines part thickness
Informs exposure technique to be used
✔✔Formula for weight - ✔✔W=mg
G(9.8) on earth
✔✔What is the unit of mass? - ✔✔kilograms (kg)
✔✔What is the unit of weight? - ✔✔N (newtons) and lbs
✔✔What is the formula for velocity ? - ✔✔velocity = distance/time
✔✔What is the speed of light? - ✔✔3.00 x 10^8 m/s
✔✔What is the formula for acceleration ? - ✔✔a=vf-vi/t
✔✔Formula for force - ✔✔F=ma
✔✔law of motion - ✔✔Force is the push or pull on an object
✔✔Newton's First Law - ✔✔An object at rest stays at rest and an object in motion stays
in motion with the same speed and in the same direction unless acted upon by an
unbalanced force.
LAW OF INERTIA
✔✔Newton's Second Law - ✔✔Force = mass x acceleration
✔✔Newton's Third Law - ✔✔For every action, there is an equal and opposite reaction
✔✔What is work? - ✔✔Mechanical work is the amount of energy transferred by a force.
✔✔Formula for work - ✔✔W=Fd
✔✔Formula for power - ✔✔P=W/t
, (Work/time)
Unit: j/s or W
✔✔The law of conservation - ✔✔Energy may be transformed from one form to another,
but it can't be created or destroyed.
✔✔Formula for Kinetic Energy - ✔✔KE=1/2mv^2
✔✔What is kinetic energy? - ✔✔The energy associated with the motion of an object
✔✔Formula for potential energy - ✔✔PE=mgh
✔✔What is potential energy ? - ✔✔The stored energy of position or configuration
✔✔ Who discovered x rays? - ✔✔Wilhelm Conrad Roentgen
✔✔When was Roentgen awarded his first Nobel prize and for what? - ✔✔Awarded first
Nobel prize for physics in 1901
✔✔What is Radiology? - ✔✔Radiology is a medical specialty using medical imaging
technologies to diagnose and treat pts
✔✔What is X-ray? - ✔✔A form of electromagnetic energy that travels at the speed of
light
✔✔What does the electromagnetic spectrum consist of? - ✔✔radio waves, microwaves,
infrared, visible light, ultraviolet rays, x-rays, and gamma rays
✔✔X rays can: - ✔✔Pass all the way through the body
Be deflected or scattered
Be absorbed
✔✔When x-rays pass through tissue, what does it depend on? - ✔✔Depends on the
energy of the X-ray and the atomic number of the tissue
Higher energy x ray - more likely to pass through
Higher atomic number - more likely to absorb the x-ray
✔✔Convetional radiographs (x-rays) - ✔✔Great place to start (cheap, fast, low
radiation)
✔✔computed tomography (CT) - ✔✔Diagnostic dilemmas (pricier, variable speed b/c
contrast)
Higher radiation
QUESTIONS AND SOLUTIONS RATED A+
✔✔What is the purpose of lead markers - ✔✔Indicate which side of the body the X-ray
is being taken on
✔✔Examples of immobilization devices - ✔✔Octagonal immobilization
Pig-o-stat for babies
✔✔What are calipers? - ✔✔Tool used for body measurement.
Determines part thickness
Informs exposure technique to be used
✔✔Formula for weight - ✔✔W=mg
G(9.8) on earth
✔✔What is the unit of mass? - ✔✔kilograms (kg)
✔✔What is the unit of weight? - ✔✔N (newtons) and lbs
✔✔What is the formula for velocity ? - ✔✔velocity = distance/time
✔✔What is the speed of light? - ✔✔3.00 x 10^8 m/s
✔✔What is the formula for acceleration ? - ✔✔a=vf-vi/t
✔✔Formula for force - ✔✔F=ma
✔✔law of motion - ✔✔Force is the push or pull on an object
✔✔Newton's First Law - ✔✔An object at rest stays at rest and an object in motion stays
in motion with the same speed and in the same direction unless acted upon by an
unbalanced force.
LAW OF INERTIA
✔✔Newton's Second Law - ✔✔Force = mass x acceleration
✔✔Newton's Third Law - ✔✔For every action, there is an equal and opposite reaction
✔✔What is work? - ✔✔Mechanical work is the amount of energy transferred by a force.
✔✔Formula for work - ✔✔W=Fd
✔✔Formula for power - ✔✔P=W/t
, (Work/time)
Unit: j/s or W
✔✔The law of conservation - ✔✔Energy may be transformed from one form to another,
but it can't be created or destroyed.
✔✔Formula for Kinetic Energy - ✔✔KE=1/2mv^2
✔✔What is kinetic energy? - ✔✔The energy associated with the motion of an object
✔✔Formula for potential energy - ✔✔PE=mgh
✔✔What is potential energy ? - ✔✔The stored energy of position or configuration
✔✔ Who discovered x rays? - ✔✔Wilhelm Conrad Roentgen
✔✔When was Roentgen awarded his first Nobel prize and for what? - ✔✔Awarded first
Nobel prize for physics in 1901
✔✔What is Radiology? - ✔✔Radiology is a medical specialty using medical imaging
technologies to diagnose and treat pts
✔✔What is X-ray? - ✔✔A form of electromagnetic energy that travels at the speed of
light
✔✔What does the electromagnetic spectrum consist of? - ✔✔radio waves, microwaves,
infrared, visible light, ultraviolet rays, x-rays, and gamma rays
✔✔X rays can: - ✔✔Pass all the way through the body
Be deflected or scattered
Be absorbed
✔✔When x-rays pass through tissue, what does it depend on? - ✔✔Depends on the
energy of the X-ray and the atomic number of the tissue
Higher energy x ray - more likely to pass through
Higher atomic number - more likely to absorb the x-ray
✔✔Convetional radiographs (x-rays) - ✔✔Great place to start (cheap, fast, low
radiation)
✔✔computed tomography (CT) - ✔✔Diagnostic dilemmas (pricier, variable speed b/c
contrast)
Higher radiation
