PRACTICE EXAM WITH 450+ QUESTIONS &
CORRECT ANSWERS 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
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%