LASERS CERTIFICATION EXAM
QUESTIONS WITH 100% CORRECT
ANSWERS | LATEST VERSION 2025/2026.
Theorized the concept of stimulated emission - ANS Einstein
Theorized that an excited electron will spontaneously return to its ground state - ANS Bohr
First ruby laser was created in _____ by ______. - ANS 1960, Ted Maiman
_________ reported in 1965 that a ruby laser could vaporize enamel. - ANS Stern and
Sognnaes
First pulsed Nd:YAG laser released in ______ and cuts ______ tissue. - ANS 1990, soft tissue
In _____ the first dental hard tissue was FDA cleared and is called _______. And the ______
laser a year later. - ANS 1997
Er: YAG laser
Er, Cr: YSGG
The word LASER is an acronym standing for _________. - ANS Light Amplification by
Stimulated Emission of Radiation
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
, Laser parameters include what 3 things? - ANS 1)Duration of exposure
2)Fiber Diameter
3)Wavelength
Lasers are:
______chromatic?
_____directional?
coherent or noncoherent?
emitted from a stimulated ____________. - ANS 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? - ANS solid, gas, semiconductor
What type of active medium is used in Er: YAG? - ANS 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? -
ANS CO2
Diode lasers have what type of active medium? - ANS semiconductor
what photons form the laser? - ANS light that leaks from the output coupler
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
QUESTIONS WITH 100% CORRECT
ANSWERS | LATEST VERSION 2025/2026.
Theorized the concept of stimulated emission - ANS Einstein
Theorized that an excited electron will spontaneously return to its ground state - ANS Bohr
First ruby laser was created in _____ by ______. - ANS 1960, Ted Maiman
_________ reported in 1965 that a ruby laser could vaporize enamel. - ANS Stern and
Sognnaes
First pulsed Nd:YAG laser released in ______ and cuts ______ tissue. - ANS 1990, soft tissue
In _____ the first dental hard tissue was FDA cleared and is called _______. And the ______
laser a year later. - ANS 1997
Er: YAG laser
Er, Cr: YSGG
The word LASER is an acronym standing for _________. - ANS Light Amplification by
Stimulated Emission of Radiation
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
, Laser parameters include what 3 things? - ANS 1)Duration of exposure
2)Fiber Diameter
3)Wavelength
Lasers are:
______chromatic?
_____directional?
coherent or noncoherent?
emitted from a stimulated ____________. - ANS 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? - ANS solid, gas, semiconductor
What type of active medium is used in Er: YAG? - ANS 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? -
ANS CO2
Diode lasers have what type of active medium? - ANS semiconductor
what photons form the laser? - ANS light that leaks from the output coupler
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
