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RADT 111 Chapter 1 Review Questions.
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RADT 111 Chapter 1 Review QuestionsTheories founded in the scientific method must allow the possibility that a position can
be proven _________________ - ANS-false/wrong .
In your text it explains that there are aspects of radiology that are quantifiable, list the
aspects that the text points out that are mathematically measurable? - ANS-contrast,
brightness, noise, sharpness, distortion, repeat rate
What are the standards of practice for all radiographers discussed in the text? -
ANS-good common sense, sound judgment, logical consistency and objective
knowledge
Which was first, the invention of manmade radiation or the discovery of natural
radioactivity? - ANS-Manmade radiation.
Were x-rays discovered by accident or was it an intentional discovery? - ANS-By
accident.
Who is Wilhelm Conrad Roentgen and what is he known for? - ANS-Wilhelm Conrad
Roentgen was a German mechanical engineer and physicist who accidentally
discovered x-rays on Nov. 8, 1895 while conducting experiments in his lab at Wurzburg
University in Germany.
The streams of electricity "jumping" from the cathode to the anode of a glass tube were
called _________ _________ when they were first discovered.
The glass tubes that scientists were experimenting with while researching the above
were called ________ ___________ - ANS-cathode rays, Crookes tubes
When experiments were being conducted on cathode rays, scientists created a vacuum
in the Crookes tube. What was happening that motivated them to do this? What did they
later discover about when there is no vacuum? - ANS-The cathode rays were creating a
blue glow and when they had a vacuum in the tube, they that is made the electrons
invisible to the eye. It was later discovered that the blue glow was a result of the
ionization of the air around them - so when they had a vacuum there was not air to
interact with and ionize.
, What was the event during Roentgen's experiment that caused him to think that there
must be some other type of radiation being emitted from the tube? - ANS-He was using
a tube covered in black cardboard to study how different materials fluoresced when they
were in the direct path of the cathode rays. While doing that he discovered that a paper
covered with barium platinocyanide not in the direct bath of the beam was glowing. He
concluded there must be another "ray" coming from the tube.
How did x-rays get the name x-rays? - ANS-Roentgen dubbed the radiation "X"
because it indicated the unknown and he didn't know what the rays were.
What is the event attributed to the birth of the field of Radiography? - ANS-Roetgen
placed his wife's hand in front of a screen and allowed the screens fluorescent light to
expose a photographic film for about 4 minutes.
How was the process of radiography introduced to the world? - ANS-Roetgen published
his paper titled, "On a New Kind of Rays."
What act of great character did Roentgen do that ensure the accessibility to his
discovery to all and why? - ANS-Roentgan refused to patent his radiographic projects
for commercial gain which ensured the accessibility of his discovery to all.
Who was Antoine Henri Becquerel and what is he known for? - ANS-Antoine Henri
Becquerel was a French physicist who discovered natural radioactivity in 1896 and who
was inspired by Roentgen to hypothesize that crystals which phosphoresce after
absorbing light also emit x-rays at the same time leading to his discovery of natural
radiation.
What are the three types of natural radiation? - ANS-Alpha rays
Beta rays
Gamma rays
Both Roentgen and Becquerel were recognized for their work by receiving what? -
ANS-The Nobel prize.
Who discovered the photoelectric effect? - ANS-Albert Einstein
Who developed the fluoroscope and what did this device do? - ANS-Thomas Edison
developed the fluoroscope. It allowed the doctor to view the patient's body under x-ray
examination in dynamic/real-time.
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