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