Radiology Test 1 Exam Questions and
Verified Answer | Graded A+
When were X-Rays discovered? - 🧠ANSWER ✔✔-Late 1800's moment
AhHa moment (don't need to cut open anymore)
-electricity was new at the time
Who discovered X-Rays? - 🧠ANSWER ✔✔Dr. Wilhelm Roentgen
-playing around with a cathoray and photography
What/who was the first person to be X-rayed? - 🧠ANSWER ✔✔Dr. Roentgen's
wife's hand
Who was the first dentist to use X-Rays medically? - 🧠ANSWER ✔✔Dr. Edmen
kails
-New Orleans
How long would X-Ray exposure take? - 🧠ANSWER ✔✔5-6 min
-extreme radiation
-very dangerous for people
When did X-Rays start to really develop? - 🧠ANSWER ✔✔-early 1900's
-1940's after WWII is more of the diagnostic tool we see today
What happens if there is more radiation? - 🧠ANSWER ✔✔the image is darker
Page 1 of 27
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER:
619652435. TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED
,what happens if the temp is raised - 🧠ANSWER ✔✔
what is emulsion? - 🧠ANSWER ✔✔-has adherence level to keep it against the
polyester base
-on both sides and gelatin
what are the crystals that are in emulsion called? - 🧠ANSWER ✔✔silver bromide
crystals
what are latent images? - 🧠ANSWER ✔✔the image that is on the film after
exposure to photons but is only seen after processing
What is the purpose of lead foil in the film packet? - 🧠ANSWER ✔✔-doesn't
absorb radiation
-always on the back side away from radiation source
-reduces scatter radiation
what does lead foil stop? - 🧠ANSWER ✔✔-stops secondary radiation
-stops it from causing over exposure to film
who discovered the x-ray?
a. c. edmund kells
b. franklin mcCormack
c. wilhelm conrad roentgen
Page 2 of 27
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER:
619652435. TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED
, d. william rollins - 🧠ANSWER ✔✔c
when were x-rays discovered? - 🧠ANSWER ✔✔nov 8 1895
Who is believed to have exposed the prototype of the first dental x-ray film?
a. C. Edmund Kells
b. Franklin McCormack
c. Wilhelm Conrad Roentgen
d. William Rollins - 🧠ANSWER ✔✔b
Who is considered by many to be the father of the science of radiation
protection?
a. william rollins
b. william morton
c. C. edmund kells
d. franklin mcCormack - 🧠ANSWER ✔✔a
what proportion of all x-ray equipment in the US is believed to be owned by
dentists?
a. 15%
b. 35%
c. 50%
Page 3 of 27
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER:
619652435. TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED
Verified Answer | Graded A+
When were X-Rays discovered? - 🧠ANSWER ✔✔-Late 1800's moment
AhHa moment (don't need to cut open anymore)
-electricity was new at the time
Who discovered X-Rays? - 🧠ANSWER ✔✔Dr. Wilhelm Roentgen
-playing around with a cathoray and photography
What/who was the first person to be X-rayed? - 🧠ANSWER ✔✔Dr. Roentgen's
wife's hand
Who was the first dentist to use X-Rays medically? - 🧠ANSWER ✔✔Dr. Edmen
kails
-New Orleans
How long would X-Ray exposure take? - 🧠ANSWER ✔✔5-6 min
-extreme radiation
-very dangerous for people
When did X-Rays start to really develop? - 🧠ANSWER ✔✔-early 1900's
-1940's after WWII is more of the diagnostic tool we see today
What happens if there is more radiation? - 🧠ANSWER ✔✔the image is darker
Page 1 of 27
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER:
619652435. TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED
,what happens if the temp is raised - 🧠ANSWER ✔✔
what is emulsion? - 🧠ANSWER ✔✔-has adherence level to keep it against the
polyester base
-on both sides and gelatin
what are the crystals that are in emulsion called? - 🧠ANSWER ✔✔silver bromide
crystals
what are latent images? - 🧠ANSWER ✔✔the image that is on the film after
exposure to photons but is only seen after processing
What is the purpose of lead foil in the film packet? - 🧠ANSWER ✔✔-doesn't
absorb radiation
-always on the back side away from radiation source
-reduces scatter radiation
what does lead foil stop? - 🧠ANSWER ✔✔-stops secondary radiation
-stops it from causing over exposure to film
who discovered the x-ray?
a. c. edmund kells
b. franklin mcCormack
c. wilhelm conrad roentgen
Page 2 of 27
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER:
619652435. TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED
, d. william rollins - 🧠ANSWER ✔✔c
when were x-rays discovered? - 🧠ANSWER ✔✔nov 8 1895
Who is believed to have exposed the prototype of the first dental x-ray film?
a. C. Edmund Kells
b. Franklin McCormack
c. Wilhelm Conrad Roentgen
d. William Rollins - 🧠ANSWER ✔✔b
Who is considered by many to be the father of the science of radiation
protection?
a. william rollins
b. william morton
c. C. edmund kells
d. franklin mcCormack - 🧠ANSWER ✔✔a
what proportion of all x-ray equipment in the US is believed to be owned by
dentists?
a. 15%
b. 35%
c. 50%
Page 3 of 27
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER:
619652435. TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED
