Laser Certification Exam 2025
Questions and Answers 100% Pass
define photobiomodulation - ✔✔light therapy
this type of laser is used on soft tissue only - ✔✔argon (diode)
this type of laser is used on all tissues - ✔✔erbium
variables affecting the outcome of laser interaction - ✔✔wavelength
target composition
energy transfer
power
interaction time
spot size
basic functions of a laser - ✔✔ablate
decontaminate
stimulate
the ___ of a laser affects its function - ✔✔wavelength
characteristics of light - ✔✔travels in a straight lines
COPYRIGHT © 2025 BY GRACE AMELIA, ALL RIGHTS RESERVED 1
,travels in waves
carries energy
gives off multiple light rays
LASER - ✔✔light amplification by stimulated emission of radiation
Frequency - ✔✔the number of complete wavelengths that pass a point in a given time
frequency is measured in - ✔✔Hertz
how does amplitude affect frequency? - ✔✔the higher the amplitude, the higher the
frequency
diode laser position on electromagnetic spectrum - ✔✔low infrared
CO2 laser position on electromagnetic spectrum - ✔✔far infrared
erbium laser position on electromagnetic spectrum - ✔✔mid infrared
all colors focused together produce - ✔✔white light
what creates the color of the laser? - ✔✔the active medium
active medium - ✔✔the source of atoms that undergo excitation in a laser; can be a gas
(CO2, argon), crystal (erbium, YAG, Nd), or semiconductor (diode)
cones in the eye are responsible for seeing - ✔✔color
rods in the eye are responsible for - ✔✔night vision, low light
the amount of light produced depends on - ✔✔the temperature of the source
white light - ✔✔multiple wavelengths
travels in multiple directions
COPYRIGHT © 2025 BY GRACE AMELIA, ALL RIGHTS RESERVED 2
, incoherent
laser light - ✔✔single wavelength
monochromatic
travels in 1 direction
coherent
collimated
stimulated emission - ✔✔the process in which an incoming photon causes an excited
atom to drop to a lower energy level, thereby emitting a photon in the same direction as
the incident photon
population inversion - ✔✔a necessary condition for laser operation, in which a
collection of atoms are in an excited state than are in lower energy states
components of a laser - ✔✔reflective mirror
pumping mechanism
active medium
transmissive mirror
lens
purpose of the reflective mirror - ✔✔makes high energy photons
purpose of the pumping mechanism - ✔✔the energy source
stimulates photon emission
purpose of the active medium - ✔✔collection of atoms that can be stimulated to a state
of inverted population
COPYRIGHT © 2025 BY GRACE AMELIA, ALL RIGHTS RESERVED 3
Questions and Answers 100% Pass
define photobiomodulation - ✔✔light therapy
this type of laser is used on soft tissue only - ✔✔argon (diode)
this type of laser is used on all tissues - ✔✔erbium
variables affecting the outcome of laser interaction - ✔✔wavelength
target composition
energy transfer
power
interaction time
spot size
basic functions of a laser - ✔✔ablate
decontaminate
stimulate
the ___ of a laser affects its function - ✔✔wavelength
characteristics of light - ✔✔travels in a straight lines
COPYRIGHT © 2025 BY GRACE AMELIA, ALL RIGHTS RESERVED 1
,travels in waves
carries energy
gives off multiple light rays
LASER - ✔✔light amplification by stimulated emission of radiation
Frequency - ✔✔the number of complete wavelengths that pass a point in a given time
frequency is measured in - ✔✔Hertz
how does amplitude affect frequency? - ✔✔the higher the amplitude, the higher the
frequency
diode laser position on electromagnetic spectrum - ✔✔low infrared
CO2 laser position on electromagnetic spectrum - ✔✔far infrared
erbium laser position on electromagnetic spectrum - ✔✔mid infrared
all colors focused together produce - ✔✔white light
what creates the color of the laser? - ✔✔the active medium
active medium - ✔✔the source of atoms that undergo excitation in a laser; can be a gas
(CO2, argon), crystal (erbium, YAG, Nd), or semiconductor (diode)
cones in the eye are responsible for seeing - ✔✔color
rods in the eye are responsible for - ✔✔night vision, low light
the amount of light produced depends on - ✔✔the temperature of the source
white light - ✔✔multiple wavelengths
travels in multiple directions
COPYRIGHT © 2025 BY GRACE AMELIA, ALL RIGHTS RESERVED 2
, incoherent
laser light - ✔✔single wavelength
monochromatic
travels in 1 direction
coherent
collimated
stimulated emission - ✔✔the process in which an incoming photon causes an excited
atom to drop to a lower energy level, thereby emitting a photon in the same direction as
the incident photon
population inversion - ✔✔a necessary condition for laser operation, in which a
collection of atoms are in an excited state than are in lower energy states
components of a laser - ✔✔reflective mirror
pumping mechanism
active medium
transmissive mirror
lens
purpose of the reflective mirror - ✔✔makes high energy photons
purpose of the pumping mechanism - ✔✔the energy source
stimulates photon emission
purpose of the active medium - ✔✔collection of atoms that can be stimulated to a state
of inverted population
COPYRIGHT © 2025 BY GRACE AMELIA, ALL RIGHTS RESERVED 3
