Questions & Answers Best Rated 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
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
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
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)
What does the FDA call laser hair removal? - Answer Permanent hair reduction
What is the highest setting the skin can tolerate without damage called? - Answer Fluence Threshold
What is the highest setting the patient can tolerate without the treatment becoming impossible called? -
Answer Patient Threshold
The amount of hair per one square centimeter is known as? - Answer Hair density
The higher the hair density, the _______ the fluence? - Answer Lower
What percentage of overlapping do you want when doing LHR? - Answer 30%
Darker/tanned skin requires what kind of fluence? - Answer Lower
What should you never use to clean a patient's skin prior to LHR? - Answer Alcohol
Pulse duration is measured in what unit? - Answer milliseconds (ms)
Spot size is measured in what unit? - Answer millimeters (mm)
Repetition rate is measured in what unit? - Answer hertz (Hz)
Who is the grandfather of laser and was the first person to use water to cool the skin during laser? -
Answer Rox Anderson