PRACTICE QUESTIONS WITH VERIFIED ANSWERS
2025/2026
1. What is a round follicle for which hair type? - ANSWER->>-Straight hair
2. Laser stands for? - ANSWER->>-
L- LIGHT
A-AMPLIFICATION
S- STIMULATED
E- EMISSION
R- RADIATION
3. What is the distance measured in nanometers between two peaks? -
ANSWER->>-Wavelength
4. Light of only one color and one specific wavelength? - ANSWER->>-
Monochromatic
5. Refraction is also know as? - ANSWER->>-Transmission
6. Newly created photon of light, requires energy equal to? - ANSWER->>-
Simulated Emission
7. Who theorized stimulated emission? - ANSWER->>-Albert Einstein
8. Alexandrite laser is in the visible light spectrum at what wavelength? -
ANSWER->>-755nm
9. The Nd:YAG laser falls in the invisible light spectrum with a wavelength of
what? - ANSWER->>-1064nm
10.What type of wave is used in laser hair removal? - ANSWER->>-Pulsed
wave
11.A chromophore is also known as what? - ANSWER->>-Target
,12.The chromophore absorbs what? - ANSWER->>-Energy
13.Googles are approved by? - ANSWER->>-ANSI (American National
Standard Institute)
14.Each laser wavelength is what to it's machine? - ANSWER->>-Specific
15.What are the parameters when doing laser hair removal? - ANSWER->>-1.
Wavelength
2. Spot size
3. Fluence
4. Pulse Width
16.Pulsed lasers allow for selective heating of specific targets, this is also
known as? - ANSWER->>-Selective Photothermolysis
17.Rate/amount of energy delivered within a given area is? - ANSWER->>-
Fluence
18.Increase in fluence equals an increase in what? - ANSWER->>-Heat
19.Length of time the light/energy is in contact with the target that is measured
in milliseconds? - ANSWER->>-Pulse width/Pulse duration
20.If the time of pulse duration is changed from milliseconds to nanoseconds
the laser is what? - ANSWER->>-Q Switched
21.A Q-Switched laser is used for what? - ANSWER->>-Tattoo Removal
22.Which skin types can tolerate an ALEX LASER? - ANSWER->>-
Fitzpatrick 1-4
23.Which skin types can tolerate an Nd:YAG laser? - ANSWER->>-ALL
SKIN TYPES
24.Which skin type can only have electrolysis? - ANSWER->>-Type 1
25.If the pulse width is greater than the thermal relaxation time, it results in? -
ANSWER->>-A Burn
, 26.If the pulse width is less than or equal to the thermal relaxation time, it
results in? - ANSWER->>-Perfect hair removal
27.Larger structures have what thermal relaxation times (TRT)? - ANSWER-
>>-Longer
28.Smaller structures have what thermal relaxation times (TRT)? - ANSWER-
>>-Shorter
29.What kind of pulse widths protect the epidermis, penetrate deeper, and cool
more slowly? - ANSWER->>-Long
30.Longer pulse widths are for what skin types? - ANSWER->>-Fitzpatrick 4-6
31.What kind of pulse widths are more aggressive and heat up and cool down
quickly? - ANSWER->>-Short
32.Shorter pulse widths are for what skin type? - ANSWER->>-Fitzpatrick 1-3
33.What percentage of follicles are damaged with each laser treatment? -
ANSWER->>-15%
34.Long term stable reduction of the growing hairs after a treatment? -
ANSWER->>-LASER HAIR REMOVAL
35.What does the FDA call laser hair removal? - ANSWER->>-Permanent hair
reduction
36.What is the highest setting the skin can tolerate without damage called? -
ANSWER->>-Fluence Threshold
37.What is the highest setting the patient can tolerate without the treatment
becoming impossible? - ANSWER->>-Patient Threshold
38.What is hair density? - ANSWER->>-The amount of hair per square
centimeter
39.The higher the hair density, the _________________ the fluence? -
ANSWER->>-Lower