LATEST CERTIFIED COSMETIC
LASER TECHNICIAN EXAM | Q&A
WITH RATIONALES
1. Which of the following is NOT a characteristic of a
true laser?
A) Coherent
B) Broad Spectrum
C) Collimated
D) Monochromatic
Correct answer: B
Rationale: Lasers are monochromatic (single
wavelength), coherent (waves in phase), and
collimated (minimally divergent); broad spectrum is a
characteristic of IPL, not laser.
2. What does the acronym LASER stand for?
A) Light Amplification by Stimulated Emission of
Radiation
B) Light Absorption by Stimulated Emission of
Radiation
C) Laser Amplification by Spontaneous Emission of
Radiation
,D) Light Amplification by Spontaneous Emission of
Radiation
Correct answer: A
Rationale: LASER is an acronym for Light
Amplification by Stimulated Emission of Radiation,
describing the process by which laser light is
generated.
3. The principle of selective photothermolysis
requires which three factors to be properly matched?
A) Wavelength, pulse duration, and fluence
B) Spot size, cooling, and repetition rate
C) Power, energy, and frequency
D) Absorption, scattering, and transmission
Correct answer: A
Rationale: Selective photothermolysis requires the
proper wavelength (to target the chromophore),
pulse duration (shorter than or equal to the thermal
relaxation time), and fluence (sufficient energy to
destroy the target).
4. Which chromophore is primarily targeted during
laser hair removal?
A) Oxyhemoglobin
,B) Water
C) Melanin
D) Collagen
Correct answer: C
Rationale: Melanin is the chromophore targeted in
laser hair removal and pigment reduction
procedures.
5. Which chromophore is targeted for vascular lesion
treatments such as spider veins?
A) Melanin
B) Oxyhemoglobin
C) Water
D) Porphyrins
Correct answer: B
Rationale: Oxyhemoglobin is the chromophore
targeted in vascular treatments because it absorbs
light strongly at specific wavelengths (e.g., 532 nm,
585-595 nm).
6. Which chromophore is primarily targeted during
laser skin resurfacing procedures?
A) Melanin
, B) Oxyhemoglobin
C) Water
D) Porphyrins
Correct answer: C
Rationale: Water is the chromophore targeted during
resurfacing procedures; ablative lasers like CO2
(10,600 nm) and Er:YAG (2940 nm) are absorbed by
water in tissue.
7. The Fitzpatrick Skin Type scale classifies skin
based on:
A) Hair color only
B) Skin color and response to UV exposure
C) Ethnic background only
D) Age and gender
Correct answer: B
Rationale: The Fitzpatrick scale assesses skin color
and its response to UV exposure (burning and
tanning tendency), which guides treatment settings
and safety.
LASER TECHNICIAN EXAM | Q&A
WITH RATIONALES
1. Which of the following is NOT a characteristic of a
true laser?
A) Coherent
B) Broad Spectrum
C) Collimated
D) Monochromatic
Correct answer: B
Rationale: Lasers are monochromatic (single
wavelength), coherent (waves in phase), and
collimated (minimally divergent); broad spectrum is a
characteristic of IPL, not laser.
2. What does the acronym LASER stand for?
A) Light Amplification by Stimulated Emission of
Radiation
B) Light Absorption by Stimulated Emission of
Radiation
C) Laser Amplification by Spontaneous Emission of
Radiation
,D) Light Amplification by Spontaneous Emission of
Radiation
Correct answer: A
Rationale: LASER is an acronym for Light
Amplification by Stimulated Emission of Radiation,
describing the process by which laser light is
generated.
3. The principle of selective photothermolysis
requires which three factors to be properly matched?
A) Wavelength, pulse duration, and fluence
B) Spot size, cooling, and repetition rate
C) Power, energy, and frequency
D) Absorption, scattering, and transmission
Correct answer: A
Rationale: Selective photothermolysis requires the
proper wavelength (to target the chromophore),
pulse duration (shorter than or equal to the thermal
relaxation time), and fluence (sufficient energy to
destroy the target).
4. Which chromophore is primarily targeted during
laser hair removal?
A) Oxyhemoglobin
,B) Water
C) Melanin
D) Collagen
Correct answer: C
Rationale: Melanin is the chromophore targeted in
laser hair removal and pigment reduction
procedures.
5. Which chromophore is targeted for vascular lesion
treatments such as spider veins?
A) Melanin
B) Oxyhemoglobin
C) Water
D) Porphyrins
Correct answer: B
Rationale: Oxyhemoglobin is the chromophore
targeted in vascular treatments because it absorbs
light strongly at specific wavelengths (e.g., 532 nm,
585-595 nm).
6. Which chromophore is primarily targeted during
laser skin resurfacing procedures?
A) Melanin
, B) Oxyhemoglobin
C) Water
D) Porphyrins
Correct answer: C
Rationale: Water is the chromophore targeted during
resurfacing procedures; ablative lasers like CO2
(10,600 nm) and Er:YAG (2940 nm) are absorbed by
water in tissue.
7. The Fitzpatrick Skin Type scale classifies skin
based on:
A) Hair color only
B) Skin color and response to UV exposure
C) Ethnic background only
D) Age and gender
Correct answer: B
Rationale: The Fitzpatrick scale assesses skin color
and its response to UV exposure (burning and
tanning tendency), which guides treatment settings
and safety.
