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Laser Technician Exam Questions With
Correct Answers.
What are the three properties of lasers that are not shared by intense pulsed light (IPL)? -
Answer✔1. Lasers are monochromatic (IPL is polychromatic) 2. Lasers have coherent energy
(IPL is incoherent) 3. Lasers' energy is collimated (IPL is divergent)
What does it mean that lasers are monochromatic and IPL is polychromatic? - Answer✔Laser
light contains 1 wavelength and 1 color, which usually treats one chromophore. IPL targets
multiple chromophores with visible and infrared light
What does it mean that lasers have coherent energy and IPL is incoherent? - Answer✔Laser light
travels as a single unit of energy which is precise and able to be manipulated. IPL can travel in
different directions causing forward and backward scatter
What does it mean that lasers energy is collimated and IPL is divergent? - Answer✔Laser
photons are parallel, the beam has minimal divergence helping laser light to remain in phase for
extended distances. IPL has forward and backward scatter
What are the four laser tissue interactions? - Answer✔1. Absorption 2. Reflection 3.
Transmission 4. Scattering
What is selective photo thermolysis? - Answer✔Targeting a specific chromophore with precise
wavelength of light and accurate duration of pulse for adequate thermal energy (staying within
TRT) to chromophore and maintaining minimal to no damage to surrounding area
What is a LED device? - Answer✔Light emitting diode devices that are non-ablative, non-
thermal and stimulate Photo modulation in cells which triggers a bio chemical response that
speeds up cellular metabolism. This can help suppress aging, speed healing, and reduce
inflammation
Define the two types of radio frequency devices. - Answer✔Monopolar and bipolar. Monopolar
devices use electrical energy which creates resistance that is converted to heat and exits body
through dispersing electrode. Bipolar have electrical current contained within handpiece by
having opposite charges on opposite ends.
1|Page
Laser Technician Exam Questions With
Correct Answers.
What are the three properties of lasers that are not shared by intense pulsed light (IPL)? -
Answer✔1. Lasers are monochromatic (IPL is polychromatic) 2. Lasers have coherent energy
(IPL is incoherent) 3. Lasers' energy is collimated (IPL is divergent)
What does it mean that lasers are monochromatic and IPL is polychromatic? - Answer✔Laser
light contains 1 wavelength and 1 color, which usually treats one chromophore. IPL targets
multiple chromophores with visible and infrared light
What does it mean that lasers have coherent energy and IPL is incoherent? - Answer✔Laser light
travels as a single unit of energy which is precise and able to be manipulated. IPL can travel in
different directions causing forward and backward scatter
What does it mean that lasers energy is collimated and IPL is divergent? - Answer✔Laser
photons are parallel, the beam has minimal divergence helping laser light to remain in phase for
extended distances. IPL has forward and backward scatter
What are the four laser tissue interactions? - Answer✔1. Absorption 2. Reflection 3.
Transmission 4. Scattering
What is selective photo thermolysis? - Answer✔Targeting a specific chromophore with precise
wavelength of light and accurate duration of pulse for adequate thermal energy (staying within
TRT) to chromophore and maintaining minimal to no damage to surrounding area
What is a LED device? - Answer✔Light emitting diode devices that are non-ablative, non-
thermal and stimulate Photo modulation in cells which triggers a bio chemical response that
speeds up cellular metabolism. This can help suppress aging, speed healing, and reduce
inflammation
Define the two types of radio frequency devices. - Answer✔Monopolar and bipolar. Monopolar
devices use electrical energy which creates resistance that is converted to heat and exits body
through dispersing electrode. Bipolar have electrical current contained within handpiece by
having opposite charges on opposite ends.
1|Page
