Exam (Latest 2024/ 2025 Update) 100%
Correct Questions and Verified Answers|
Grade A
Laser stands for what? - CORRECT- Light
Amplification by
Stimulated
Emission of
Radiation
What is the distance measured in nanometers between two peaks or two troughs known
as? - CORRECT- Wavelength
Light of only one color & one specific wavelength is known as? - CORRECT-
Monochromatic
Refraction is also known as what? - CORRECT- 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? - CORRECT-
Stimulated Emission
The states of equilibrium or middle state of light - CORRECT- Metastable State
Who theorized stimulated emission? - CORRECT- Albert Einstein
The part of the laser that contains the active medium is called? - CORRECT-
Resinator cavity
What are the states of light in stimulated emission? - CORRECT- Ground State
Excited State
Singlet State
Metastable State
Alexandrite laer is in the visible light spectrum at what wavelength? - CORRECT- 755 nm
,The Nd:YAG laser falls in the invisible light spectrum with a wavelength of what? -
CORRECT- 1064 nm
What type of wave is used in laser hair removal? - CORRECT- Pulsed wave
A chromophore is also know at what? - CORRECT- Target
The chromophore absorbs what? - CORRECT- Energy
Goggles worn by the patient and practitioner must be approved by which group? -
CORRECT- ANSI (American National Standard Institute) for Class 3B and Class 4
Lasers
Each laser wavelength is what to its machine? - CORRECT- Specific
What are the parameters when doing laser hair removal? - CORRECT-
Wavelength Spot Size
Fluence
Pulse Width
Pulsed lasers allow for selective heating of specific targets, this is also known as? -
CORRECT- Selective Photothermolysis
The rate/amount of energy delivered within a given area is known as? - CORRECT-
Fluence
An increase in fluence equals an increase in what? - CORRECT- Heat. Resulting in more
damage
The length of time the light/energy is in contact with the target that is measured in
milliseconds (ms): - CORRECT- Pulse width/Pulse duration
If the time of pulse duration is changed from milliseconds to nanoseconds the laser is
what? - CORRECT- Q Switched
A Q switched laser is used for what? - CORRECT- Tattoo removal
Which skin types can tolerate an Alex laser? - CORRECT- 1-4
Which skin types can tolerate a Nd:YAG laser? - CORRECT- All skin types
Which skin type should only have electrolysis and no laser? - CORRECT- Type 1
If the pulse width is greater than the thermal relaxation time it results in? - CORRECT-
A burn
, If the pulse width is less than or equal to the thermal relaxation time it results in? -
CORRECT- Perfect hair removal
Larger structures have thermal relaxation times (TRT) - CORRECT- Longer
Smaller structures have thermal relaxation times (TRT) - CORRECT- Shorter
What kind of pulse widths protect the epidermis, penetrate deeper and cool more
slowly? - CORRECT- Long
Longer pulse widths are for what skin type? - CORRECT- 4-6
What kind of pulse widths are more aggressive and heat up and cool down quickly? -
CORRECT- Short
Shorter pulse widths are for what skin type? - CORRECT- 1-3
What percentage of follicles are damaged with each laser treatment? - CORRECT- 15%
What is a long-term stable reduction of the growing hairs after a treatment regime? -
CORRECT- Laser Hair Removal (LHR)
What does the FDA call laser hair removal? - CORRECT- Permanent hair reduction
What is the highest setting the skin can tolerate without damage called? - CORRECT-
Fluence Threshold
What is the highest setting the patient can tolerate without the treatment becoming
impossible called? - CORRECT- Patient Threshold
The amount of hair per one square centimeter is known as? - CORRECT- Hair density
The higher the hair density, the the fluence? - CORRECT- Lower
What percentage of overlapping do you want when doing LHR? - CORRECT- 30%
Darker/tanned skin requires what kind of fluence? - CORRECT- Lower
What should you never use to clean a patient's skin prior to LHR? - CORRECT- Alcohol
Pulse duration is measured in what unit? - CORRECT- milliseconds (ms)
Spot size is measured in what unit? - CORRECT- millimeters (mm)
Repetition rate is measured in what unit? - CORRECT- hertz (Hz)