LASER HAIR REMOVAL EXAM 2025
QUESTIONS AND ANSWERS
What does the word LASER stand for? - ANS light amplification stimulated emission of
radiation
what are the four characteristics of a wave? - ANS wavelength, frequency, velocity,
amplitude
wavelength - ANS distance between 2 peaks of the wave measured in nanometers
frequency - ANS number of wave cycles per second; measured in hertz
velocity - ANS speed of light
amplitude - ANS height of the wave
what is the common standard of measure used for a wavelength? - ANS nanometers
explain the correlation between the wavelength, energy, frequency, amplitude, and
penetration to the surface - ANS -shorter waves have more energy, higher frequency, higher
amplitudes, less penetration
-long waves have less energy, less frequency, less amplitudes, more penetration
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,what is the range for visible light? (nm) - ANS 400-780nm
what are actinic rays? - ANS damaging rays that come from the sun
what wavelengths are considered to be actinic? - ANS 0-400nm
what wavelengths for IR light? - ANS 780-10,000
what is spontaneous emission? - ANS process of energy absorption by electrons and emitting
spontaneously
what are the components of laser? - ANS active medium, excitation mechanism, feedback
mirrors, laser output
what are 3 unique characteristics of the laser light? - ANS 1) monochromatic
2) coherant
3) collimated
coherence - ANS wave patterns are locked in one phase (up and down together)
collimation - ANS laser that creates a light beam that stays together as a tight beam of light
over long distance without diverging
monochromaticity - ANS -one wavelength/color,
-same wavelength number, color
who were 3 people developing the theory of LASER? - ANS -albert einstein
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, -charlers townes
-arthur shawlow
who invented the first laser and when? - ANS -theodore maiman
-1960
in the visible spectrum, what is the color? - ANS wavelength
give the order of colors in the visible spectrum - ANS violet, indigo, blue, green, yellow,
orange, red
what is active medium of a laser? - ANS substance that creates the laser light
what types of active medium are commonly used? - ANS solid, liquid, gas, electronic
what is the energy source of a LASER? - ANS stimulates active medium
types of the energy sources used in different lasers - ANS direct current, radio frequency,
optical (flashlight), other lasers
what conditions do we use lasers in esthetics for? - ANS -hair reducation
-hyperpigmentation
-skin rejuvenation
-spider veins
-stretch marks
-telangiectasia
-capillaries
COPYRIGHT © 2025 THESTAR ALL RIGHTS RESERVED 3
QUESTIONS AND ANSWERS
What does the word LASER stand for? - ANS light amplification stimulated emission of
radiation
what are the four characteristics of a wave? - ANS wavelength, frequency, velocity,
amplitude
wavelength - ANS distance between 2 peaks of the wave measured in nanometers
frequency - ANS number of wave cycles per second; measured in hertz
velocity - ANS speed of light
amplitude - ANS height of the wave
what is the common standard of measure used for a wavelength? - ANS nanometers
explain the correlation between the wavelength, energy, frequency, amplitude, and
penetration to the surface - ANS -shorter waves have more energy, higher frequency, higher
amplitudes, less penetration
-long waves have less energy, less frequency, less amplitudes, more penetration
COPYRIGHT © 2025 THESTAR ALL RIGHTS RESERVED 1
,what is the range for visible light? (nm) - ANS 400-780nm
what are actinic rays? - ANS damaging rays that come from the sun
what wavelengths are considered to be actinic? - ANS 0-400nm
what wavelengths for IR light? - ANS 780-10,000
what is spontaneous emission? - ANS process of energy absorption by electrons and emitting
spontaneously
what are the components of laser? - ANS active medium, excitation mechanism, feedback
mirrors, laser output
what are 3 unique characteristics of the laser light? - ANS 1) monochromatic
2) coherant
3) collimated
coherence - ANS wave patterns are locked in one phase (up and down together)
collimation - ANS laser that creates a light beam that stays together as a tight beam of light
over long distance without diverging
monochromaticity - ANS -one wavelength/color,
-same wavelength number, color
who were 3 people developing the theory of LASER? - ANS -albert einstein
COPYRIGHT © 2025 THESTAR ALL RIGHTS RESERVED 2
, -charlers townes
-arthur shawlow
who invented the first laser and when? - ANS -theodore maiman
-1960
in the visible spectrum, what is the color? - ANS wavelength
give the order of colors in the visible spectrum - ANS violet, indigo, blue, green, yellow,
orange, red
what is active medium of a laser? - ANS substance that creates the laser light
what types of active medium are commonly used? - ANS solid, liquid, gas, electronic
what is the energy source of a LASER? - ANS stimulates active medium
types of the energy sources used in different lasers - ANS direct current, radio frequency,
optical (flashlight), other lasers
what conditions do we use lasers in esthetics for? - ANS -hair reducation
-hyperpigmentation
-skin rejuvenation
-spider veins
-stretch marks
-telangiectasia
-capillaries
COPYRIGHT © 2025 THESTAR ALL RIGHTS RESERVED 3
