LASER TECHNICIAN EXAM QUESTIONS AND
ANSWERS
What three properties do lasers have that are not shared by IPL? - ANSWER 1.
Lasers are monochromatic whereas IPL is polychromatic 2. Energy from lasers
is coherent whereas IPL is incoherent 3. Energy from lasers is collimated; IPL
diverges
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
Identify 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.
What are the two major processes of aging? - ANSWER Extrinsic aging,
intrinsic ageing. Intrinsic ageing is genetics and gravity, extrinsic ageing this
portion for which we are responsible and external factors
What are two layers of the skin? - ANSWER Epidermis, dermis
What are GAGs? - ANSWER glycosaminoglycans which are polysaccharide
chains that can bind water up to 1000x their weight. GAG's attract moisture,
aged skin appears to have less GAG's
What is NMF? - ANSWER Natural moisturizing factors, found in upper skin
layer (stratum corneum) allowing cells to bind with water. NMF produces soft,
flexible skin
Why is TEWL important? - ANSWER Transepidermal water loss is important
because this water loss is through evaporation through our skin and can be
replaced with water intake
ANSWERS
What three properties do lasers have that are not shared by IPL? - ANSWER 1.
Lasers are monochromatic whereas IPL is polychromatic 2. Energy from lasers
is coherent whereas IPL is incoherent 3. Energy from lasers is collimated; IPL
diverges
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
Identify 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.
What are the two major processes of aging? - ANSWER Extrinsic aging,
intrinsic ageing. Intrinsic ageing is genetics and gravity, extrinsic ageing this
portion for which we are responsible and external factors
What are two layers of the skin? - ANSWER Epidermis, dermis
What are GAGs? - ANSWER glycosaminoglycans which are polysaccharide
chains that can bind water up to 1000x their weight. GAG's attract moisture,
aged skin appears to have less GAG's
What is NMF? - ANSWER Natural moisturizing factors, found in upper skin
layer (stratum corneum) allowing cells to bind with water. NMF produces soft,
flexible skin
Why is TEWL important? - ANSWER Transepidermal water loss is important
because this water loss is through evaporation through our skin and can be
replaced with water intake
