REASONING:->>>X-
rays were discovered by Wilhelm Conrad Roentgen on November 8,1895.
JS JS JS JS JS JS JS JS JS S
J
REFERENCE: Page.1 J S
2. What type of tube was Roentgen working with in his lab when x-rays were discovered?
JS JS JS JS JS JS JS JS JS JS JS JS JS JS
a. Crookes tube JS
b. Fluorescent tube JS
c. High-vacuumtube JS
d. Wurzburg tube JS
ACCURATE ANS:-A JS
REASONING:->>>Roentgen was working with a low-vacuum tube known as a Crookes tube. JS JS JS JS JS JS JS JS JS JS JS
REFERENCE: Page.2 J S
3. Which ofthe following terms could be defined as the instantaneous production of light onlyduri
JS JS JS JS JS JS JS JS JS JS JS JS JS JS S
J
ng an interaction between a type of energy and some element or compound?
JS JS JS JS JS JS JS JS JS JS JS JS
a. Phosphorescence
b. Afterglow
c. Glowing
d. Fluorescence
ACCURATE ANS:-D JS
REASONING:-
>>>Fluorescence is the instantaneous emission of light froma material due tothe interaction with s JS JS JS JS JS JS JS JS JS JS JS S
J JS JS JS
ome type of energy.
JS JS JS
REFERENCE: Page.2 J S
4. Bariumplatinocyanide was the: JS JS JS
a. type of dark paper Roentgen used to darken his laboratory.
JS JS JS JS JS JS JS JS JS
b. material Roentgen used to produce the first radiograph of his wife’s hand. JS JS JS JS JS JS JS JS S
J JS JS
c. metal used to produce the low-vacuum tube. JS JS JS JS JS JS
d. fluorescent materialthat glowed whenthe tube was energized. JS JS JS JS JS JS JS JS
ACCURATE ANS:-D JS
REASONING:-
>>>A piece ofpaper coated with barium platinocyanide glowed each timeRoentgen energized his tub
JS JS JS JS JS JS JS JS JS JS S
J JS JS JS
e.
REFERENCE: Page.2 J S
,5. The first radiograph produced by Roentgen, ofhis wife’s hand, required an exposure time of:
JS JS JS JS JS JS JS JS JS JS JS JS JS JS
a. 15 s. JS
b. 150 s.
J S JS
c. 15 min. JS
d. 150 min. JS
ACCURATE ANS:-C JS
REASONING:->>>It took a 15-min exposure time to produce the first radiograph. JS JS JS JS JS JS JS JS JS JS
REFERENCE: Page.3 J S
6. The letter x in x-ray is the symbol for:
JS JS JS JS JS JS JS JS
a. electricity.
b. the unknown. JS
c. penetrating.
d. discovery.
ACCURATE ANS:-B JS
REASONING:->>>The letter x represents the mathematical symbol of the unknown. JS JS JS JS JS JS JS JS JS
REFERENCE: Page.3 J S
7. The first NobelPrize for physics was received in 1901 by:
JS JS JS JS JS JS JS JS JS JS
a. Marie Curie. S
J
b. WilliamCrookes. JS
c. Wilhelm Roentgen. JS
d. Albert Einstein. S
J
ACCURATE ANS:-C JS
REASONING:->>>Wilhelm Roentgen received the first Nobel Prize for physics in 1901. JS JS JS JS JS JS JS JS JS JS
REFERENCE: Page.4 J S
8. X-rays were at one time called:
JS JS JS JS JS
a. Becquerelrays. S
J
b. Roentgenrays. JS
c. Z-rays.
d. none of the above. JS JS JS
ACCURATE ANS:-B JS
REASONING:->>>X-rays were at one time called Roentgen rays. JS JS JS JS JS JS JS
REFERENCE: Page.4 J S
9. Erythema, an early sign of biologic damage due to x-ray exposure, is:
JS JS JS JS JS JS JS JS JS JS JS
a. reddening ofthe skin. JS JS JS
b. a malignant tumor.
JS JS
c. a chromosomal change.
JS JS
d. one ofthe most serious effects of x-ray exposure.
JS JS JS JS JS JS JS JS
ACCURATE ANS:-A JS
, REASONING:-
>>>Erythema is reddening and burning ofthe skin, an early and less seriouseffect of exposure to large
JS JS JS JS JS JS JS JS JS JS JS JS S
J JS JS JS JS J
doses of x-radiation.
S JS JS
REFERENCE: Page.5 J S
10. X-rays have which ofthe following properties?
JS JS JS JS JS JS
a. Electrical
b. Magnetic
c. Chemical
d. A and B JS JS
e. A and C JS JS
ACCURATE ANS:-D JS
REASONING:->>>X-
rays, a type ofelectromagnetic radiation, have both electrical andmagnetic properties.
JS JS JS JS JS JS JS JS JS S
J JS
REFERENCE: Page.5 J S
11. The distance between two successive crests of a sine wave is known as:
JS JS JS JS JS JS JS JS JS JS JS JS
a. an angstrom. JS
b. frequency.
c. the Greek letter nu. JS JS JS
d. wavelength
ACCURATE ANS:-D JS
REASONING:-
>>>The distance between two successive crests or troughs of a sine wave is themeasure of its wavele
JS JS JS JS JS JS JS JS JS JS JS JS JS S
J JS JS JS
ngth.
REFERENCE: Page.6 J S
12. X-rays used in radiography have wavelengths that are measured in:
JS JS JS JS JS JS JS JS JS
a. angstroms.
b. millimeters.
c. centimeters.
d. hertz.
ACCURATE ANS:-A JS
X-
rays in the range used in radiography have wavelengths that are so short that theyaremeasured in a
JS JS JS JS JS JS JS JS JS JS JS JS JS JS JS S
J JS JS
ngstroms.
REFERENCE: Page.6 J S
13. The frequency of a wave is the number of waves passing a given point per given unit of time.Freq
JS JS JS JS JS JS JS JS JS JS JS JS JS JS JS JS JS JS S
J
uency is measured in: JS JS JS
a. angstroms.
b. hertz.
c. inches.
d. eV.
ACCURATE ANS:-B JS
REASONING:->>>The unit of frequency is hertz. The frequency of x- JS JS JS JS JS JS JS JS JS
rays in theradiographyrange varies from about 3 1019 to 3 1018 Hz.
JS JS S
J JS JS JS JS JS JS JS JS JS JS JS JS
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