dark adaptation an increase in the eye’s sensitivity to light that occurs after the reduction or complete absence of light energy reaching it, attributable to changes in the level or light-sensitive pigments in the eye’s receptor cells
the largest source of ionizing radiation exposure to a population isa. consumer productsb. medical and dental examinationsc. atmospheric weapons testsd. nuclear energy productione. naturally occurring radionuclides
Which of the following would increase the number of electrons flowing through the dental x-ray electrical circuita. an increase in the milliamperageb. an increase the kilovoltagec. an increase in the PID length
A setting of 85 kVp is equal to how many volts?a. 850b. 8500c. 85,000d. 850,000e. 8,500,000
True / False. True / Falsevoltage is the measurement of the number of electrons flowing in an electrical circuit. Decreasing the voltage decreases the force that moves the electrons along an electrical conductor.
True / False. True / FalseThe cathode is the electrically negative portion of the vacuum tube, and it is composed of a focusing cup and filament.
the kVp control regulates all of the following EXCEPT which one?a. accelerating potentialb. attraction between anode and cathodec. penetrating power of the x-ray beamd. heating of the filament
which of the following PID lengths BEST decreases radiation exposure to the patient and improves image resolution?a. 8 inchesb. 4 inchesc. 12 inchesd. 16 inches
X-radiation was discovered by _________
A quality radiograph is obtained using a 4 inch PID and an exposure time of 3 impulses. The PID was removed and replaced with a 16 inch PID. What should the new exposure time be to maintain image density?
In which of the following conditions would vertical bitewing radiographs be recommended over horizontal bitewing radiograph?a. child with rampant cariesb. adolescent with suspected third molar impactionsc. adult with mal-aligned teethd. adult wih periodontal diseases (bone loss)
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