LASER HAIR REMOVAL ACTUAL FINAL PAPER QUESTIONS
AND ANSWERS 2025/2026
✔✔what wavelength should we use for hair reduction with skin types V-VI? - ✔✔Nd:
YAG 1064
✔✔what wavelength would work best for capillaries on the face? - ✔✔dye 85
✔✔what wavelength would work best for superficial spider veins on the leg and why? -
✔✔Nd: YAG 1064
✔✔from what wavelength does water start to absorb light? - ✔✔890nm
✔✔at what stage of hair growth can laser be effective and why? - ✔✔-anagen
-because melanin is present from the shaft into the papilla
✔✔can laser be effective on gray hair? - ✔✔no
✔✔can laser be effective on blond hair? - ✔✔no
✔✔can laser be effective on red hair? - ✔✔no
✔✔can laser be effective on white hair and why? - ✔✔no, because there is no melanin
✔✔why do we have to use a longer wavelength for darker skin types in hair reduction? -
✔✔there is more melanin in the skin
✔✔in order to be effective, laser light should be - ✔✔absorbed
✔✔for darker skin types, we have to use ____ fluence and ____ pulse duration to be
safe - ✔✔less, longer
✔✔fluence indicates the total amount of ____ delivered to the skin - ✔✔energy
✔✔the formula for fluence is - ✔✔F=J(jewels)/CM^2
✔✔lasers are used for the following applications - ✔✔-esthetics: hair reduction
-doctor: hyper pigmentation, skin resurfacing, laser lipo, spider veins, scarring, tattoo
removal, stretch marks, couperose skin, angiomas, telangiectasia, melasma
✔✔lasers are FDA approved for: - ✔✔permanent hair reduction
✔✔when did lasers come into esthetics? - ✔✔late 80s to early 90s
, ✔✔what class is commonly used in esthetics and for medical purposes? - ✔✔IV (4)
✔✔what class is a fire hazard and can cause skin/eye injuries? - ✔✔class IV (4)
✔✔beam hazards - ✔✔-ricochet
-cause eye injury
✔✔non beam hazards - ✔✔-direct contact
-cause skin burns, scars, pigmentation, and infections
✔✔Albert Einstein - ✔✔-began the process idea in 1917
-published a paper called "To The Quantum Theory of the Radiation"
✔✔Charles Townes and Arthur Shawlow - ✔✔wrote a paper on optical emissions in
1958
✔✔Theodore Maiman - ✔✔-created the first laser (Ruby Laser) at the 694nm
wavelength
-has a patent on this laser
✔✔Leon Goldman - ✔✔-MD who brought lasers to medicine in 1970
✔✔what organizations provide guidelines of laser/safety training? - ✔✔american
national standards institute (ANSI)
✔✔what best describes the ANSI safety regulations? - ✔✔they are voluntary standards
by themselves, but are used as a reference by other agencies such as OSHA and
JCAHO
✔✔most surgical lasers are classified as which Hazard Class of Laser (ANSI)? -
✔✔class 4
✔✔how often are formal laser safety audits required to be conducted within a facility to
be in compliance with ANSI recommendations? - ✔✔every year
✔✔all service technicians should have - ✔✔documented laser safety training and
education
✔✔which is a non-beam laser hazard? - ✔✔burns
✔✔the NHZ (Nominal Hazard Zone) required that: - ✔✔-all personnel wear safety
eyewear only when inside the NHZ boundary
-all personnel must follow all control measures within the NHZ
AND ANSWERS 2025/2026
✔✔what wavelength should we use for hair reduction with skin types V-VI? - ✔✔Nd:
YAG 1064
✔✔what wavelength would work best for capillaries on the face? - ✔✔dye 85
✔✔what wavelength would work best for superficial spider veins on the leg and why? -
✔✔Nd: YAG 1064
✔✔from what wavelength does water start to absorb light? - ✔✔890nm
✔✔at what stage of hair growth can laser be effective and why? - ✔✔-anagen
-because melanin is present from the shaft into the papilla
✔✔can laser be effective on gray hair? - ✔✔no
✔✔can laser be effective on blond hair? - ✔✔no
✔✔can laser be effective on red hair? - ✔✔no
✔✔can laser be effective on white hair and why? - ✔✔no, because there is no melanin
✔✔why do we have to use a longer wavelength for darker skin types in hair reduction? -
✔✔there is more melanin in the skin
✔✔in order to be effective, laser light should be - ✔✔absorbed
✔✔for darker skin types, we have to use ____ fluence and ____ pulse duration to be
safe - ✔✔less, longer
✔✔fluence indicates the total amount of ____ delivered to the skin - ✔✔energy
✔✔the formula for fluence is - ✔✔F=J(jewels)/CM^2
✔✔lasers are used for the following applications - ✔✔-esthetics: hair reduction
-doctor: hyper pigmentation, skin resurfacing, laser lipo, spider veins, scarring, tattoo
removal, stretch marks, couperose skin, angiomas, telangiectasia, melasma
✔✔lasers are FDA approved for: - ✔✔permanent hair reduction
✔✔when did lasers come into esthetics? - ✔✔late 80s to early 90s
, ✔✔what class is commonly used in esthetics and for medical purposes? - ✔✔IV (4)
✔✔what class is a fire hazard and can cause skin/eye injuries? - ✔✔class IV (4)
✔✔beam hazards - ✔✔-ricochet
-cause eye injury
✔✔non beam hazards - ✔✔-direct contact
-cause skin burns, scars, pigmentation, and infections
✔✔Albert Einstein - ✔✔-began the process idea in 1917
-published a paper called "To The Quantum Theory of the Radiation"
✔✔Charles Townes and Arthur Shawlow - ✔✔wrote a paper on optical emissions in
1958
✔✔Theodore Maiman - ✔✔-created the first laser (Ruby Laser) at the 694nm
wavelength
-has a patent on this laser
✔✔Leon Goldman - ✔✔-MD who brought lasers to medicine in 1970
✔✔what organizations provide guidelines of laser/safety training? - ✔✔american
national standards institute (ANSI)
✔✔what best describes the ANSI safety regulations? - ✔✔they are voluntary standards
by themselves, but are used as a reference by other agencies such as OSHA and
JCAHO
✔✔most surgical lasers are classified as which Hazard Class of Laser (ANSI)? -
✔✔class 4
✔✔how often are formal laser safety audits required to be conducted within a facility to
be in compliance with ANSI recommendations? - ✔✔every year
✔✔all service technicians should have - ✔✔documented laser safety training and
education
✔✔which is a non-beam laser hazard? - ✔✔burns
✔✔the NHZ (Nominal Hazard Zone) required that: - ✔✔-all personnel wear safety
eyewear only when inside the NHZ boundary
-all personnel must follow all control measures within the NHZ
