©SIRJOEL EXAM SOLUTIONS 2024/2025
ALL RIGHTS RESERVED.
LASER HAIR REMOVAL Exam Questions
And Answers
LASER - Answers✔Light amplification by the stimulated emission of radiation
Light consist of many wave lengths - Answers✔Laser consist of just one
The FDA approved lasers for permanent hair reduction - Answers✔In. 1997
When was the Ruby crystal laser invented - Answers✔In 1960
The Ruby crystal uses what wavelength - Answers✔694 nm
In 1960 the ruby crystal was invented and used for - Answers✔Dermatology and ophthalmology
ELECTROMAGNETIC SPECTRUM of RADIATION - Answers✔Visible and invisible light
The light we see belongs to what spectrum - Answers✔ELECTROMAGNETIC SPECTRUM of
RADIATION
The spectrum of light is arranged by its frequency of its waves - Answers✔Longest, lowest
waves to shortest highest waves. Radio waves are longest and gamma waves are shortest
Wavelength - Answers✔Is the measurement between the distance of two consecutive peaks in
a wave ( peak or troughs )
Short wave length - Answers✔High frequency
High intensity
High melanin absorption
Long wave length - Answers✔Low frequency
Low intensity
Low melanin absorption
Ruby laser - Answers✔694nm
Alexandrite - Answers✔755nm
Diode - Answers✔800nm , 810nm
1|Page
, ©SIRJOEL EXAM SOLUTIONS 2024/2025
ALL RIGHTS RESERVED.
Nd Yag - Answers✔1064nm
Ruby and alexandrite - Answers✔Short wave length
High frequency
High intensity
Nd Yag - Answers✔Long wavelength
Low frequency
Low intensity
Nanometers
Nm - Answers✔How a Wavelength is measured
Infrared - Answers✔Lasers are in this wavelength
Radio wave have the longest wavelength in the spectrum - Answers✔Radio waves
Infrared light ( IR ) - Answers✔Is invisible and thermal
Infrared energy - Answers✔Felt as heat on the skin and can be captured in thermal imaging
Longest wavelength visible light - Answers✔Red
Shortest wavelength viable light - Answers✔Violet
Some laser hair removal devices are in the red light and some are in the near infrared part of
the electromagnetic spectrum - Answers✔
Ultraviolet light - Answers✔Highly energetic with shorter wavelengths than visible light
UVA rays - Answers✔95% of UV radiation that reaches the earth
UVA rays - Answers✔Penetrate the skin more deeply and are dominate tanning rays. Cause
photo aging and skin cancer
UVB rays - Answers✔Cause skin burns and effect the epidermis. Also cause cancer and photo
aging
UVC RAYS - Answers✔Rays are absorbed by the ozone layer and don't reach the earth
Gamma rays - Answers✔Have the shortest most powerful wavelength and the most energetic
form of light
Gamma rays can kill living cells - Answers✔Used in medicine to kill cancerous cells
Laser light - Answers✔Is coherent
2|Page
ALL RIGHTS RESERVED.
LASER HAIR REMOVAL Exam Questions
And Answers
LASER - Answers✔Light amplification by the stimulated emission of radiation
Light consist of many wave lengths - Answers✔Laser consist of just one
The FDA approved lasers for permanent hair reduction - Answers✔In. 1997
When was the Ruby crystal laser invented - Answers✔In 1960
The Ruby crystal uses what wavelength - Answers✔694 nm
In 1960 the ruby crystal was invented and used for - Answers✔Dermatology and ophthalmology
ELECTROMAGNETIC SPECTRUM of RADIATION - Answers✔Visible and invisible light
The light we see belongs to what spectrum - Answers✔ELECTROMAGNETIC SPECTRUM of
RADIATION
The spectrum of light is arranged by its frequency of its waves - Answers✔Longest, lowest
waves to shortest highest waves. Radio waves are longest and gamma waves are shortest
Wavelength - Answers✔Is the measurement between the distance of two consecutive peaks in
a wave ( peak or troughs )
Short wave length - Answers✔High frequency
High intensity
High melanin absorption
Long wave length - Answers✔Low frequency
Low intensity
Low melanin absorption
Ruby laser - Answers✔694nm
Alexandrite - Answers✔755nm
Diode - Answers✔800nm , 810nm
1|Page
, ©SIRJOEL EXAM SOLUTIONS 2024/2025
ALL RIGHTS RESERVED.
Nd Yag - Answers✔1064nm
Ruby and alexandrite - Answers✔Short wave length
High frequency
High intensity
Nd Yag - Answers✔Long wavelength
Low frequency
Low intensity
Nanometers
Nm - Answers✔How a Wavelength is measured
Infrared - Answers✔Lasers are in this wavelength
Radio wave have the longest wavelength in the spectrum - Answers✔Radio waves
Infrared light ( IR ) - Answers✔Is invisible and thermal
Infrared energy - Answers✔Felt as heat on the skin and can be captured in thermal imaging
Longest wavelength visible light - Answers✔Red
Shortest wavelength viable light - Answers✔Violet
Some laser hair removal devices are in the red light and some are in the near infrared part of
the electromagnetic spectrum - Answers✔
Ultraviolet light - Answers✔Highly energetic with shorter wavelengths than visible light
UVA rays - Answers✔95% of UV radiation that reaches the earth
UVA rays - Answers✔Penetrate the skin more deeply and are dominate tanning rays. Cause
photo aging and skin cancer
UVB rays - Answers✔Cause skin burns and effect the epidermis. Also cause cancer and photo
aging
UVC RAYS - Answers✔Rays are absorbed by the ozone layer and don't reach the earth
Gamma rays - Answers✔Have the shortest most powerful wavelength and the most energetic
form of light
Gamma rays can kill living cells - Answers✔Used in medicine to kill cancerous cells
Laser light - Answers✔Is coherent
2|Page
