LASER TECHNICIAN COMPREHENSIVE
EXAMINATION TEST 2026 FULL QUESTIONS
AND CORRECT ANSWERS
⩥ Theorized that an excited electron will spontaneously return to its
ground state. Answer: Bohr
⩥ First ruby laser was created in _____ by ______.. Answer: 1960, Ted
Maiman
⩥ _________ reported in 1965 that a ruby laser could vaporize enamel..
Answer: Stern and Sognnaes
⩥ First pulsed Nd:YAG laser released in ______ and cuts ______
tissue.. Answer: 1990, soft tissue
⩥ In _____ the first dental hard tissue was FDA cleared and is called
_______. And the ______ laser a year later.. Answer: 1997
Er: YAG laser
Er, Cr: YSGG
⩥ The word LASER is an acronym standing for _________.. Answer:
Light Amplification by Stimulated Emission of Radiation
,⩥ Laser parameters include what 3 things?. Answer: 1)Duration of
exposure
2)Fiber Diameter
3)Wavelength
⩥ Lasers are:
______chromatic?
_____directional?
coherent or noncoherent?
emitted from a stimulated ____________.. Answer: monochromatic:
made of a single wavelength (visible or infrared)
unidirectional
coherent (all peaks and valleys of each wave travel in unison)
active medium
⩥ What states can the active medium be in?. Answer: solid, gas,
semiconductor
⩥ What type of active medium is used in Er: YAG?. Answer: solid state
using crystal matrix (erbium laced yttrium, aluminum and garnet)
, ⩥ What type of gas is used when the active medium is sealed in an air
tight chamber?. Answer: CO2
⩥ Diode lasers have what type of active medium?. Answer:
semiconductor
⩥ what photons form the laser?. Answer: light that leaks from the output
coupler
⩥ Stimulated emission:. Answer: atoms of the active medium are
stimulated to a higher energy level--> released as a photon as the atom
returns to a more stable lower energy level.
⩥ Amplification. Answer: Released photons can go on to stimulate more
atoms in the crystal, thus producing more photons
⩥ Energy density depends on what 3 things?. Answer: energy,
divergence (tendency of a laser beam to spread outward=laser beam
diameter increases), and distance
⩥ Energy is measured in ______. Answer: Joules (millijoules)
⩥ Power is ______ and is measured in _______. Answer: rate of doing
work, or energy used over a period of time and is measured in Watts
(J/sec)
EXAMINATION TEST 2026 FULL QUESTIONS
AND CORRECT ANSWERS
⩥ Theorized that an excited electron will spontaneously return to its
ground state. Answer: Bohr
⩥ First ruby laser was created in _____ by ______.. Answer: 1960, Ted
Maiman
⩥ _________ reported in 1965 that a ruby laser could vaporize enamel..
Answer: Stern and Sognnaes
⩥ First pulsed Nd:YAG laser released in ______ and cuts ______
tissue.. Answer: 1990, soft tissue
⩥ In _____ the first dental hard tissue was FDA cleared and is called
_______. And the ______ laser a year later.. Answer: 1997
Er: YAG laser
Er, Cr: YSGG
⩥ The word LASER is an acronym standing for _________.. Answer:
Light Amplification by Stimulated Emission of Radiation
,⩥ Laser parameters include what 3 things?. Answer: 1)Duration of
exposure
2)Fiber Diameter
3)Wavelength
⩥ Lasers are:
______chromatic?
_____directional?
coherent or noncoherent?
emitted from a stimulated ____________.. Answer: monochromatic:
made of a single wavelength (visible or infrared)
unidirectional
coherent (all peaks and valleys of each wave travel in unison)
active medium
⩥ What states can the active medium be in?. Answer: solid, gas,
semiconductor
⩥ What type of active medium is used in Er: YAG?. Answer: solid state
using crystal matrix (erbium laced yttrium, aluminum and garnet)
, ⩥ What type of gas is used when the active medium is sealed in an air
tight chamber?. Answer: CO2
⩥ Diode lasers have what type of active medium?. Answer:
semiconductor
⩥ what photons form the laser?. Answer: light that leaks from the output
coupler
⩥ Stimulated emission:. Answer: atoms of the active medium are
stimulated to a higher energy level--> released as a photon as the atom
returns to a more stable lower energy level.
⩥ Amplification. Answer: Released photons can go on to stimulate more
atoms in the crystal, thus producing more photons
⩥ Energy density depends on what 3 things?. Answer: energy,
divergence (tendency of a laser beam to spread outward=laser beam
diameter increases), and distance
⩥ Energy is measured in ______. Answer: Joules (millijoules)
⩥ Power is ______ and is measured in _______. Answer: rate of doing
work, or energy used over a period of time and is measured in Watts
(J/sec)
