1. When6were6X-rays6 discovered?
a. October68,61985
b. November68,61895
c. January623,61896
d. August615,61902
CORRECT6ANSWER:6B
X-rays6 were6discovered6by6Wilhelm6Conrad6Roentgen6on6November68,61895.
REFFERENCE:6p.1
2. What6type6of6tube6was6Roentgen6working6with6in6his6lab6when6X-rays6 were6discovered?
a. Crookes6tube
b. Fluorescent6tube
c. High-vacuum6tube
d. Wurzburg6tube
3. Which6of6the6following6terms6could6be6defined6as6the6instantaneous6production6of6light6only6
during6an6interaction6between6a6type6of6energy6and6some6element6or6compound?
a. Phosphorescence
b. Afterglow
c. Glowing
d. Fluorescence
CORRECT6ANSWER:6D
Fluorescence6is6the6instantaneous6emission6of6light6from6a6material6due6to6the6interaction6with6s
ome6type6of6energy.
REFFERENCE:6p.2
4. Barium6platinocyanide6was6the:
a. type6of6dark6paper6Roentgen6used6to6darken6his6laboratory.
b. material6Roentgen6used6to6produce6the6first6radiograph6of6his6wife’s6hand.
c. metal6used6to6produce6the6low-vacuum6tube.
d. fluorescent6material6that6glowed6when6the6tube6was6energized.
, 5. The6first6radiograph6produced6by6Roentgen,6of6his6wife’s6hand,6required6an6exposure6time6of:
a. 156s.
b.6 1506s.
c. 156min.
d. 1506min.
ANS: C
It6took6a615-min6exposure6time6to6produce6the6first6radiograph.
REFFERENCE:6p.3
6. The6letter6x6in6x-ray6is6the6symbol6for:
a. electricity.
b. the6unknown.
c. penetrating.
d. discovery.
ANS: B
The6letter6x6represents6the6mathematical6symbol6of6the6unknown.
REFFERENCE:6p.3
7. The6first6Nobel6Prize6for6physics6was6received6in619016by:
a. Marie6Curie.
b. William6Crookes.
c. Wilhelm6Roentgen.
d. Albert6Einstein.
ANS: C
Wilhelm6Roentgen6received6the6first6Nobel6Prize6for6physics6in61901.
REFFERENCE:6p.4
8. X-rays6 were6at6one6time6called:
a. Becquerel6rays.
b. Roentgen6rays.
c. Z-rays.
d. none6of6the6above.
ANS: B
X-rays6 were6at6one6time6called6Roentgen6rays.
REFFERENCE:6p.4
9. Erythema,6an6early6sign6 of6biologic6damage6due6to6x-ray6exposure,6is:
a. reddening6of6the6skin.
b. a6malignant6tumor.
c. a6chromosomal6change.
d. one6of6the6most6serious6effects6of6x-ray6exposure.
ANS: A
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