Laser Exam 2026 Actual with Questions & Answers (Latest
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Terms in this set (71)
Which best characterizes laser waves: C - Monochromatic, collimated, coherent
A - Quasichromatic, non-collimated, non-coherent
B - Multichromatic, non-collimated, non-coherent
C - Monochromatic, collimated, coherent
A laser pulse cycles between ON for 5 ms and OFF for B - 20%
20 ms. What is the duty cycle?
A - 10%
B - 20%
C - 25%
D - 40%
Which of the following lasers is used on hard tissue? A - CO2 9,250 nm
A - CO2 9,250 nm
B - THOR
C - Nd:YAG 1064nm
D - Diodes 810-1064nm
What is the definition of Power? B - Amount of work performed per unit time, expressed in watts (W)
A - Ability to perform work, expressed in joules (J)
B - Amount of work performed per unit time, expressed
in watts (W)
C - A measurement of the total amount of time that the
pulse is emitted
D - The power of a single, brief emission from a laser
programmed for pulsed behavior rather than
continuous operation
, When do you test fire a laser? B - Always test fire before use
A - When it is a new laser
B - Always test fire before use
C - Depends on the laser
D - Never
Electromagnetic waves transport energy through a. Empty Space
a. Empty Space
b. A material medium
c. Matter
d. Mechanical waves
Which is not a way lasers interact with tissues? b. Transduction
a. Reflection
b. Transduction
c. Scattering
d. Absorption
Which laser wavelewngths can penetrate to the retina d. BothA&C
of the eye and cause damage?
a. Diode wavelengths
b. Er:YAG
c. Nd:YAG
d. BothA&C
Light-induced fluorescence can be used for d. BothA&B
a. Caries detection
b. Mucosal evaluation
c. Pain relief
d. BothA&B
Continuous wave lasers cause increased char of tissue a. Both statements are true
compared to ultraspeed or superpulse lasers.
Ultraspeed or superpulse lasers cause minimal heat
spread compared to continuous wave lasers.
a. Both statements are true
b. Statement 1 is true; statement 2 is false
c. Both statements are false
d. Statement 1 is false; statement 2 is true
Which of the following is NOT a tissue chromophore b. Sodium (not at the dental wavelength)
that absorbs a laser wavelength?
a. Water
b. Sodium (not at the dental wavelength)
c. Hemoglobin
d. Melanocytes
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Terms in this set (71)
Which best characterizes laser waves: C - Monochromatic, collimated, coherent
A - Quasichromatic, non-collimated, non-coherent
B - Multichromatic, non-collimated, non-coherent
C - Monochromatic, collimated, coherent
A laser pulse cycles between ON for 5 ms and OFF for B - 20%
20 ms. What is the duty cycle?
A - 10%
B - 20%
C - 25%
D - 40%
Which of the following lasers is used on hard tissue? A - CO2 9,250 nm
A - CO2 9,250 nm
B - THOR
C - Nd:YAG 1064nm
D - Diodes 810-1064nm
What is the definition of Power? B - Amount of work performed per unit time, expressed in watts (W)
A - Ability to perform work, expressed in joules (J)
B - Amount of work performed per unit time, expressed
in watts (W)
C - A measurement of the total amount of time that the
pulse is emitted
D - The power of a single, brief emission from a laser
programmed for pulsed behavior rather than
continuous operation
, When do you test fire a laser? B - Always test fire before use
A - When it is a new laser
B - Always test fire before use
C - Depends on the laser
D - Never
Electromagnetic waves transport energy through a. Empty Space
a. Empty Space
b. A material medium
c. Matter
d. Mechanical waves
Which is not a way lasers interact with tissues? b. Transduction
a. Reflection
b. Transduction
c. Scattering
d. Absorption
Which laser wavelewngths can penetrate to the retina d. BothA&C
of the eye and cause damage?
a. Diode wavelengths
b. Er:YAG
c. Nd:YAG
d. BothA&C
Light-induced fluorescence can be used for d. BothA&B
a. Caries detection
b. Mucosal evaluation
c. Pain relief
d. BothA&B
Continuous wave lasers cause increased char of tissue a. Both statements are true
compared to ultraspeed or superpulse lasers.
Ultraspeed or superpulse lasers cause minimal heat
spread compared to continuous wave lasers.
a. Both statements are true
b. Statement 1 is true; statement 2 is false
c. Both statements are false
d. Statement 1 is false; statement 2 is true
Which of the following is NOT a tissue chromophore b. Sodium (not at the dental wavelength)
that absorbs a laser wavelength?
a. Water
b. Sodium (not at the dental wavelength)
c. Hemoglobin
d. Melanocytes
