RAD 140- EXAM 1 QUESTIONS AND ANSWERS
Who made the discovery of x-rays? - Answers - German scientist Dr. Wilhelm Conrad
Roentgen
What did Roentgen discover? - Answers - The crooke's tube
Where did Roentgen make his discovery? - Answers - Germany, Europe
When did Roentgen make his discovery? - Answers - November 8, 1895
What did Roentgen receive as a prize for his discovery? - Answers - He was the
recipient of first Nobel Prize for physics
What was the first radiograph? - Answers - Roentgen's wife, Anna Bertha's, hand
How long was the first exposure? - Answers - 15 min
How are x-rays characterized? - Answers - As a type of electromagnetic radiation
What does electromagnetic mean? - Answers - Energy that has both electrical and
magnetic properties
What is the dual nature of x-ray energy? - Answers - It behaves like both waves and
particles
What is wavelength? - Answers - Represents distance between 2 crests
What is frequency? - Answers - Number of waves passing a given point per given unit
of time
How would you describe wavelength and frequency in terms of their relationship? -
Answers - They are both inversely related
When there is a high energy, what happens to wavelength and frequency? - Answers -
Wavelength-decreases
Frequency-increases
What is matter? - Answers - Anything that occupies space
What is the difference between mass and weight? - Answers - Mass-quantity of matter
contained in an object
Weight- force that an object exerts under the influence of gravity
What is energy? - Answers - Ability to do work
, What is radiation? - Answers - When energy is emitted and transferred through matter
What is the Law of Conservation? - Answers - Sum total of all matter and energy in the
universe is constant: matter and energy cannot be created or destroyed but can be
converted from one form to another
What type of biologic damage can be caused by radiation exposure? - Answers - Hair
loss, burns, cell damage/mutations, and death, etc.
What does fluorescence have to do with the discovery of x-rays? - Answers - It was the
neon (glow) of light that was being emitted through matter
What type of energy is used in the production of x-rays? - Answers - Ionizing radiation
What technical factor determines the energy of an x-ray? - Answers - kVp
Rank the following in order according to wavelength (1 being the longest wavelength
and 8 the shortest wavelength):
Visible light
X-rays
Ultraviolet light
Gamma rays
Radio waves
Microwaves
Cosmic rays
Infrared light - Answers - 1. Radio waves
2. Microwaves
3. Infrared light
4. Visible light
5. Ultraviolet light
6. X-rays
7. Gamma rays
8. Cosmic rays
What unit is length measured in? - Answers - m (meters)
What unit is mass measured in? - Answers - kg (kilogram)
What unit is time measured in? - Answers - s (seconds)
What unit is velocity measured in? - Answers - m/s (meters per second)
What unit is work measured in? - Answers - Joules (J)
What unit is power measured in? - Answers - Joules per second (J/s)
Who made the discovery of x-rays? - Answers - German scientist Dr. Wilhelm Conrad
Roentgen
What did Roentgen discover? - Answers - The crooke's tube
Where did Roentgen make his discovery? - Answers - Germany, Europe
When did Roentgen make his discovery? - Answers - November 8, 1895
What did Roentgen receive as a prize for his discovery? - Answers - He was the
recipient of first Nobel Prize for physics
What was the first radiograph? - Answers - Roentgen's wife, Anna Bertha's, hand
How long was the first exposure? - Answers - 15 min
How are x-rays characterized? - Answers - As a type of electromagnetic radiation
What does electromagnetic mean? - Answers - Energy that has both electrical and
magnetic properties
What is the dual nature of x-ray energy? - Answers - It behaves like both waves and
particles
What is wavelength? - Answers - Represents distance between 2 crests
What is frequency? - Answers - Number of waves passing a given point per given unit
of time
How would you describe wavelength and frequency in terms of their relationship? -
Answers - They are both inversely related
When there is a high energy, what happens to wavelength and frequency? - Answers -
Wavelength-decreases
Frequency-increases
What is matter? - Answers - Anything that occupies space
What is the difference between mass and weight? - Answers - Mass-quantity of matter
contained in an object
Weight- force that an object exerts under the influence of gravity
What is energy? - Answers - Ability to do work
, What is radiation? - Answers - When energy is emitted and transferred through matter
What is the Law of Conservation? - Answers - Sum total of all matter and energy in the
universe is constant: matter and energy cannot be created or destroyed but can be
converted from one form to another
What type of biologic damage can be caused by radiation exposure? - Answers - Hair
loss, burns, cell damage/mutations, and death, etc.
What does fluorescence have to do with the discovery of x-rays? - Answers - It was the
neon (glow) of light that was being emitted through matter
What type of energy is used in the production of x-rays? - Answers - Ionizing radiation
What technical factor determines the energy of an x-ray? - Answers - kVp
Rank the following in order according to wavelength (1 being the longest wavelength
and 8 the shortest wavelength):
Visible light
X-rays
Ultraviolet light
Gamma rays
Radio waves
Microwaves
Cosmic rays
Infrared light - Answers - 1. Radio waves
2. Microwaves
3. Infrared light
4. Visible light
5. Ultraviolet light
6. X-rays
7. Gamma rays
8. Cosmic rays
What unit is length measured in? - Answers - m (meters)
What unit is mass measured in? - Answers - kg (kilogram)
What unit is time measured in? - Answers - s (seconds)
What unit is velocity measured in? - Answers - m/s (meters per second)
What unit is work measured in? - Answers - Joules (J)
What unit is power measured in? - Answers - Joules per second (J/s)
