PA EFDA BOARD TEST EXAM 2025 ACTUAL EXAM COMPLETE EXAM QUESTIONS WITH
DETAILED VERIFIED ANSWERS (100% CORRECT ANSWERS) /ALREADY GRADED A+
Laser stands for what? - (ANSWER)Light
Amplification by
Stimulated
Emission of
Radiation
What is the distance measured in nanometers between two peaks or two troughs known as? -
(ANSWER)Wavelength
Light of only one color & one specific wavelength is known as? - (ANSWER)Monochromatic
Refraction is also known as what? - (ANSWER)Transmission
The process where by a newly created photon of light (generated through amplification) acquires energy
equal to the photons that created it is known as? - (ANSWER)Stimulated Emission
The states of equilibrium or middle state of light - (ANSWER)Metastable State
Who theorized stimulated emission? - (ANSWER)Albert Einstein
The part of the laser that contains the active medium is called? - (ANSWER)Resinator cavity
What are the states of light in stimulated emission? - (ANSWER)Ground State
,PA EFDA BOARD TEST EXAM 2025 ACTUAL EXAM COMPLETE EXAM QUESTIONS WITH
DETAILED VERIFIED ANSWERS (100% CORRECT ANSWERS) /ALREADY GRADED A+
Excited State
Singlet State
Metastable State
Alexandrite laer is in the visible light spectrum at what wavelength? - (ANSWER)755 nm
The Nd:YAG laser falls in the invisible light spectrum with a wavelength of what? - (ANSWER)1064 nm
What type of wave is used in laser hair removal? - (ANSWER)Pulsed wave
A chromophore is also know at what? - (ANSWER)Target
The chromophore absorbs what? - (ANSWER)Energy
Goggles worn by the patient and practitioner must be approved by which group? - (ANSWER)ANSI
(American National Standard Institute) for Class 3B and Class 4 Lasers
Each laser wavelength is what to its machine? - (ANSWER)Specific
What are the parameters when doing laser hair removal? - (ANSWER)Wavelength
Spot Size
Fluence
,PA EFDA BOARD TEST EXAM 2025 ACTUAL EXAM COMPLETE EXAM QUESTIONS WITH
DETAILED VERIFIED ANSWERS (100% CORRECT ANSWERS) /ALREADY GRADED A+
Pulse Width
Pulsed lasers allow for selective heating of specific targets, this is also known as? - (ANSWER)Selective
Photothermolysis
The rate/amount of energy delivered within a given area is known as? - (ANSWER)Fluence
An increase in fluence equals an increase in what? - (ANSWER)Heat. Resulting in more damage
The length of time the light/energy is in contact with the target that is measured in milliseconds (ms): -
(ANSWER)Pulse width/Pulse duration
If the time of pulse duration is changed from milliseconds to nanoseconds the laser is what? -
(ANSWER)Q Switched
A Q switched laser is used for what? - (ANSWER)Tattoo removal
Which skin types can tolerate an Alex laser? - (ANSWER)1-4
Which skin types can tolerate a Nd:YAG laser? - (ANSWER)All skin types
Which skin type should only have electrolysis and no laser? - (ANSWER)Type 1
, PA EFDA BOARD TEST EXAM 2025 ACTUAL EXAM COMPLETE EXAM QUESTIONS WITH
DETAILED VERIFIED ANSWERS (100% CORRECT ANSWERS) /ALREADY GRADED A+
If the pulse width is greater than the thermal relaxation time it results in? - (ANSWER)A burn
If the pulse width is less than or equal to the thermal relaxation time it results in? - (ANSWER)Perfect
hair removal
Larger structures have __________ thermal relaxation times (TRT) - (ANSWER)Longer
Smaller structures have _______ thermal relaxation times (TRT) - (ANSWER)Shorter
What kind of pulse widths protect the epidermis, penetrate deeper and cool more slowly? -
(ANSWER)Long
Longer pulse widths are for what skin type? - (ANSWER)4-6
What kind of pulse widths are more aggressive and heat up and cool down quickly? - (ANSWER)Short
Shorter pulse widths are for what skin type? - (ANSWER)1-3
What percentage of follicles are damaged with each laser treatment? - (ANSWER)15%
What is a long-term stable reduction of the growing hairs after a treatment regime? - (ANSWER)Laser
Hair Removal (LHR)
DETAILED VERIFIED ANSWERS (100% CORRECT ANSWERS) /ALREADY GRADED A+
Laser stands for what? - (ANSWER)Light
Amplification by
Stimulated
Emission of
Radiation
What is the distance measured in nanometers between two peaks or two troughs known as? -
(ANSWER)Wavelength
Light of only one color & one specific wavelength is known as? - (ANSWER)Monochromatic
Refraction is also known as what? - (ANSWER)Transmission
The process where by a newly created photon of light (generated through amplification) acquires energy
equal to the photons that created it is known as? - (ANSWER)Stimulated Emission
The states of equilibrium or middle state of light - (ANSWER)Metastable State
Who theorized stimulated emission? - (ANSWER)Albert Einstein
The part of the laser that contains the active medium is called? - (ANSWER)Resinator cavity
What are the states of light in stimulated emission? - (ANSWER)Ground State
,PA EFDA BOARD TEST EXAM 2025 ACTUAL EXAM COMPLETE EXAM QUESTIONS WITH
DETAILED VERIFIED ANSWERS (100% CORRECT ANSWERS) /ALREADY GRADED A+
Excited State
Singlet State
Metastable State
Alexandrite laer is in the visible light spectrum at what wavelength? - (ANSWER)755 nm
The Nd:YAG laser falls in the invisible light spectrum with a wavelength of what? - (ANSWER)1064 nm
What type of wave is used in laser hair removal? - (ANSWER)Pulsed wave
A chromophore is also know at what? - (ANSWER)Target
The chromophore absorbs what? - (ANSWER)Energy
Goggles worn by the patient and practitioner must be approved by which group? - (ANSWER)ANSI
(American National Standard Institute) for Class 3B and Class 4 Lasers
Each laser wavelength is what to its machine? - (ANSWER)Specific
What are the parameters when doing laser hair removal? - (ANSWER)Wavelength
Spot Size
Fluence
,PA EFDA BOARD TEST EXAM 2025 ACTUAL EXAM COMPLETE EXAM QUESTIONS WITH
DETAILED VERIFIED ANSWERS (100% CORRECT ANSWERS) /ALREADY GRADED A+
Pulse Width
Pulsed lasers allow for selective heating of specific targets, this is also known as? - (ANSWER)Selective
Photothermolysis
The rate/amount of energy delivered within a given area is known as? - (ANSWER)Fluence
An increase in fluence equals an increase in what? - (ANSWER)Heat. Resulting in more damage
The length of time the light/energy is in contact with the target that is measured in milliseconds (ms): -
(ANSWER)Pulse width/Pulse duration
If the time of pulse duration is changed from milliseconds to nanoseconds the laser is what? -
(ANSWER)Q Switched
A Q switched laser is used for what? - (ANSWER)Tattoo removal
Which skin types can tolerate an Alex laser? - (ANSWER)1-4
Which skin types can tolerate a Nd:YAG laser? - (ANSWER)All skin types
Which skin type should only have electrolysis and no laser? - (ANSWER)Type 1
, PA EFDA BOARD TEST EXAM 2025 ACTUAL EXAM COMPLETE EXAM QUESTIONS WITH
DETAILED VERIFIED ANSWERS (100% CORRECT ANSWERS) /ALREADY GRADED A+
If the pulse width is greater than the thermal relaxation time it results in? - (ANSWER)A burn
If the pulse width is less than or equal to the thermal relaxation time it results in? - (ANSWER)Perfect
hair removal
Larger structures have __________ thermal relaxation times (TRT) - (ANSWER)Longer
Smaller structures have _______ thermal relaxation times (TRT) - (ANSWER)Shorter
What kind of pulse widths protect the epidermis, penetrate deeper and cool more slowly? -
(ANSWER)Long
Longer pulse widths are for what skin type? - (ANSWER)4-6
What kind of pulse widths are more aggressive and heat up and cool down quickly? - (ANSWER)Short
Shorter pulse widths are for what skin type? - (ANSWER)1-3
What percentage of follicles are damaged with each laser treatment? - (ANSWER)15%
What is a long-term stable reduction of the growing hairs after a treatment regime? - (ANSWER)Laser
Hair Removal (LHR)
