LASER CERTIFICATION | QUESTIONS AND ANSWERS
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Define photobiomodulation - Answer: light therapy
This type of laser is used on soft tissue only - Answer: argon (diode)
This type of laser is used on all tissues - Answer: erbium
Variables affecting the outcome of laser interaction - Answer: wavelength
Target composition
Energy transfer
Power
Interaction time
Spot size
Basic functions of a laser - Answer: ablate
Decontaminate
Stimulate
The ___ of a laser affects its function - Answer: wavelength
Characteristics of light - Answer: travels in a straight lines
Travels in waves
Carries energy
Gives off multiple light rays
1
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,LASER - Answer: light amplification by stimulated emission of radiation
Frequency - Answer: the number of complete wavelengths that pass a point in a given
time
Frequency is measured in - Answer: Hertz
How does amplitude affect frequency? - Answer: the higher the amplitude, the higher
the frequency
Diode laser position on electromagnetic spectrum - Answer: low infrared
CO2 laser position on electromagnetic spectrum - Answer: far infrared
Erbium laser position on electromagnetic spectrum - Answer: mid infrared
All colors focused together produce - Answer: white light
What creates the color of the laser? - Answer: the active medium
Active medium - Answer: 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 - Answer: color
Rods in the eye are responsible for - Answer: night vision, low light
The amount of light produced depends on - Answer: the temperature of the source
2
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, White light - Answer: multiple wavelengths
Travels in multiple directions
Incoherent
Laser light - Answer: single wavelength
Monochromatic
Travels in 1 direction
Coherent
Collimated
Stimulated emission - Answer: 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 - Answer: 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 - Answer: reflective mirror
Pumping mechanism
Active medium
Transmissive mirror
Lens
Purpose of the reflective mirror - Answer: makes high energy photons
Purpose of the pumping mechanism - Answer: the energy source
Stimulates photon emission
3
APPHIA - Crafted with Care and Precision for Academic Excellence.
| 100% ACCURACY.
Define photobiomodulation - Answer: light therapy
This type of laser is used on soft tissue only - Answer: argon (diode)
This type of laser is used on all tissues - Answer: erbium
Variables affecting the outcome of laser interaction - Answer: wavelength
Target composition
Energy transfer
Power
Interaction time
Spot size
Basic functions of a laser - Answer: ablate
Decontaminate
Stimulate
The ___ of a laser affects its function - Answer: wavelength
Characteristics of light - Answer: travels in a straight lines
Travels in waves
Carries energy
Gives off multiple light rays
1
APPHIA - Crafted with Care and Precision for Academic Excellence.
,LASER - Answer: light amplification by stimulated emission of radiation
Frequency - Answer: the number of complete wavelengths that pass a point in a given
time
Frequency is measured in - Answer: Hertz
How does amplitude affect frequency? - Answer: the higher the amplitude, the higher
the frequency
Diode laser position on electromagnetic spectrum - Answer: low infrared
CO2 laser position on electromagnetic spectrum - Answer: far infrared
Erbium laser position on electromagnetic spectrum - Answer: mid infrared
All colors focused together produce - Answer: white light
What creates the color of the laser? - Answer: the active medium
Active medium - Answer: 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 - Answer: color
Rods in the eye are responsible for - Answer: night vision, low light
The amount of light produced depends on - Answer: the temperature of the source
2
APPHIA - Crafted with Care and Precision for Academic Excellence.
, White light - Answer: multiple wavelengths
Travels in multiple directions
Incoherent
Laser light - Answer: single wavelength
Monochromatic
Travels in 1 direction
Coherent
Collimated
Stimulated emission - Answer: 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 - Answer: 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 - Answer: reflective mirror
Pumping mechanism
Active medium
Transmissive mirror
Lens
Purpose of the reflective mirror - Answer: makes high energy photons
Purpose of the pumping mechanism - Answer: the energy source
Stimulates photon emission
3
APPHIA - Crafted with Care and Precision for Academic Excellence.
