Laser and Light-Based Hair Removal Physics Exam Questions and Answers 100% Solved
What is the acronym for LASER? - ANSWER_Light Amplification by Stimulated Emission of Radiation
Photothermolysis is based on the principle of using: - ANSWER_Laser energy to selectively destroy a target beneath the surface of the skin
The measure of energy density delivered to the tissue expressed in joules per cm2 is
called? - ANSWER_Fluence
The principle of selective photothermolysis relies on the presence of what substance in the follicle and surrounding structure? - ANSWER_Melanin
Laser pulse width represents the: - ANSWER_Amount of time the target is exposed to the laser
In laser hair removal the most important consideration associated with spot size is the: - ANSWER_Depth of penetration of the energy into the dermis
The amount of time it takes a substance after heating to return to its normal temperature is known as: - ANSWER_Thermal relaxation time
When excited with a flashlamp the ehe alexandrite crystal emits radiation at: - ANSWER_755nm
Select the response with all the correct properties of laser light as it reacts with tissue. - ANSWER_-Reflection
-Absorption
-Transmission
-Sccatter
Longer laser wavelengths: - ANSWER_Penetrate more
Permanent hair reduction according to the FDA is defined as? - ANSWER_A long term stable reduction in the number of hairs regrowing after a treatment regime
In laser hair removal, what need to be damaged in order to prevent further hair growth? - ANSWER_Stem cells and dermal papilla
Select the wavelength for a long pulsed Ruby laser. - ANSWER_694nm
What is the acronym for LASER? - ANSWER_Light Amplification by Stimulated Emission of Radiation
Photothermolysis is based on the principle of using: - ANSWER_Laser energy to selectively destroy a target beneath the surface of the skin
The measure of energy density delivered to the tissue expressed in joules per cm2 is
called? - ANSWER_Fluence
The principle of selective photothermolysis relies on the presence of what substance in the follicle and surrounding structure? - ANSWER_Melanin
Laser pulse width represents the: - ANSWER_Amount of time the target is exposed to the laser
In laser hair removal the most important consideration associated with spot size is the: - ANSWER_Depth of penetration of the energy into the dermis
The amount of time it takes a substance after heating to return to its normal temperature is known as: - ANSWER_Thermal relaxation time
When excited with a flashlamp the ehe alexandrite crystal emits radiation at: - ANSWER_755nm
Select the response with all the correct properties of laser light as it reacts with tissue. - ANSWER_-Reflection
-Absorption
-Transmission
-Sccatter
Longer laser wavelengths: - ANSWER_Penetrate more
Permanent hair reduction according to the FDA is defined as? - ANSWER_A long term stable reduction in the number of hairs regrowing after a treatment regime
In laser hair removal, what need to be damaged in order to prevent further hair growth? - ANSWER_Stem cells and dermal papilla
Select the wavelength for a long pulsed Ruby laser. - ANSWER_694nm
