Laser & IPL Practice Test
Laser Test Questions
Who discovered the relationship between energy and frequency of radiation in 1900?
a) Albert Einstein b) Max Planck c) Theodore Maiman d) Gordon Gould
What does LASER stand for?
a) Light Amplification by Stimulated Energy Response
b) Light Adjustment by Stable Emission of Radiation
c) Light Amplification by Stimulated Emission of Radiation
d) Luminous Adjustment by Stimulated Energy Radiation
In which year did Einstein theorize stimulated emission?
a) 1900 b) 1917 c) 1951 d) 1960
What is the primary chromophore targeted in laser hair removal?
a) Hemoglobin b) Oxygen c) Melanin d) Water
What is the wavelength of an Alexandrite laser?
a) 694 nm b) 755 nm c) 1064 nm d) 810 nm
Which principle states that only light which is absorbed by a system can cause a chemical change?
a) Grotthuss Law
b) Planck's Principle
c) Photochemical Activation
d) Stimulated Emission
Laser beams are characterized by being:
a) Divergent
b) Polychromatic
c) Monochromatic
d) Non-coherent
Which of the following best describes stimulated emission?
a) An electron jumping to an excited state
b) Emission of photons in random directions
c) Creation of identical photons by electron stimulation
d) Absorption of light energy by tissue
The concept of Selective Photothermolysis applies to which process?
a) Electrical stimulation of lasers
b) Targeted destruction of chromophores
c) Amplification of light intensity
d) Reflection of laser light
What is the process when electrons return from an excited state by emitting photons?
a) Transmission
b) Scattering
c) Spontaneous Emission
d) Stimulated Emission
How do you measure a laser's wavelength?
a) Milliseconds
b) Cm per second
c) Nanometers
d) Joules
What is the meaning of 'fluence' in the context of lasers?
a) The total duration of exposure
b) Energy per unit area
c) Depth of penetration
d) Distance between peaks of light waves
What cooling method is used to reduce discomfort during laser treatments?
a) Cryogen spraying
b) Laser beam reflection
c) Enhanced ventilation
d) Increased pulse width
Which of the following is NOT a property of laser light?
a) Coherent
b) Collimated
c) Divergent
d) Monochromatic
In what year was the ruby laser invented?
a) 1951 b) 1960 c) 1996 d) 1997
What determines the depth of penetration of a laser beam in tissue?
a) Wavelength and spot size
b) Laser power
c) Duration of exposure
d) All of the above
What effect does non-ionizing radiation have on DNA?
a) Alters it
b) Does not change it
c) Destroys it
d) Mutates it
Which laser is commonly used in healthcare facilities for various applications?a) Diode Laser
b) Ruby Laser
c) Nd-YAG Laser
d) All of the above
What phenomenon occurs when a laser beam is absorbed by the skin?
a) Reflection
b) Transference
c) Scattering
d) Absorption
Which of the following is a type of hazard associated with lasers?
a) Non-beam hazards
b) Electrical hazards
c) Light burn hazards
d) All of the above
What type of melanin gives hair its black or brown color?
a) Pheomelanin
b) Eumelanin
c) Melatonin
d) None
What does pulse width determine in laser treatments?
a) Size of laser beam
b) Duration of time energy is applied
c) Type of chromophore
d) Depth of laser penetration
What did R. Rox Anderson discover in 1996?
a) Lasers could target hair follicles
b) Lasers could treat skin wounds
c) Lasers could assess eyesight
d) Lasers could replace surgery
Which of the following is NOT a component of a laser system?
a) Optical cavity
b) Power source
c) Photon absorber
d) Delivery system
In laser treatments, what is the purpose of epidermal cooling?
a) Increases pain
b) Reduces side effects
c) Increases skin temperature
d) None of the above
What is an example of non-ionizing radiation?
a) X-Rays
b) Ultraviolet Light
c) Microwaves
d) Gamma Rays
Which of the following is a safety guideline for laser usage?
a) Secure storage of equipment
b) Training personnel
c) Eye protection
d) All of the above
The thermal relaxation time (TRT) refers to:
a) Time it takes for tissue to cool down by 50-63%
b) Duration of laser pulse
c) Wavelength of laser light
d) Energy density of the laser
What type of laser has a wavelength of 810 nm?
a) Alexandrite b) Ruby c) Diode d) Nd-YAG
Which statement is true regarding melanin absorption?
a) Absorbs all wavelengths equally
b) Absorption is maximized at specific wavelengths
c) Does not affect how lasers work
d) Absorbs only visible light
What does the American National Standard Institute (ANSI) Z136 specialize in?a) Setting electrical standards
b) Laser safety standards
c) Medical equipment standards
d) Safety clothing regulations
What happens when laser energy is transmitted through the skin?
a) Completely absorbed
b) Transmitted without any effect
c) Some energy is lost
d) All energy scatters
What happens during the process of scattering?
a) Light energy is absorbed completely
b) Laser energy is redistributed in different directions
c) Light energy remains focused
d) No interaction occurs
What is a characteristic of Intense Pulsed Light (IPL)?
a) Monochromatic
b) Polychromatic
c) Collimated
d) Coherent
In laser hair removal, what skin type is generally more effective?
a) Dark skin and dark hair
b) Light skin and dark hair
c) Light skin and light hair
d) Dark skin and light hair
What type of tissue change is most commonly targeted in laser treatment?
a) Nerve
b) Muscle
c) Hair follicle
d) Bone
The use of protective goggles during laser procedures is crucial for:
a) Reducing glare
b) Preventing laser exposure to eyes
c) Enhancing visibility
d) None of the above
How is fluence expressed?
a) Joules
b) Joules per square centimeter
c) Nanometers
d) milliseconds
One of the benefits of using a gel for epidermal cooling is:
a) It increases absorption
b) It cools the skin
c) It makes lasers ineffective
d) It helps stop bleeding
What should be the first step in controlling a fire hazard from lasers?
a) Develop a fire response plan
b) Train personnel about fire hazards
c) Ensure proper ventilation
d) Remove all combustible materials
Why is it essential not to expose the eye to laser light?
a) The eye is not affected by light
b) It can cause burns and long-term damage
c) It can enhance laser effects
d) None of the above
Which factor affects how much light is absorbed by skin?
a) The skin's color
b) Wavelength of the laser
c) Both a and b
d) None of the above
Which laser has a wavelength of approximately 1064 nm?
a) Alexandrite
b) Ruby
c) Diode
d) Nd-YAG
What is the primary goal of a laser safety officer?
a) To classify lasers
b) To oversee equipment repairs
c) To ensure compliance with safety standards
d) To train personnel
What does the term 'oscillation' refer to in a laser system?
a) Emitting random photons
b) Repeatedly exciting electrons
c) Stabilizing energy input
d) None of the above
Which component of a laser system determines the characteristics of the laser light?
a) Power source
b) Delivery system
c) Lasing medium
d) Optical cavity
Why is oxygen a concern when using a laser procedure?
a) It supports combustion
b) It absorbs laser energy
c) It cools the skin
d) None of the above
What characterizes light emitted from lasers?
a) Random frequency
b) Variety of colors
c) Same frequency and phase
d) None of the above
Which best describes how light interacts with biological tissues?
a) Reflected only
b) Absorbed, reflected, scattered, transmitted
c) Limited to absorption
d) None of the above
What is an essential aspect of developing a laser safety program?
a) Engagement with other medical practitioners
b) Compliance with legal standards
c) Transparency in procedures
d) All of the above
Answer Key for Laser Test Questions
b) Max Planck
c) Light Amplification by Stimulated Emission of Radiation
b) 1917
c) Melanin
b) 755 nm
a) Grotthuss Law
c) Monochromatic
c) Creation of identical photons by electron stimulation
b) Targeted destruction of chromophores
c) Spontaneous Emission
c) Nanometers
b) Energy per unit area
a) Cryogen spraying
c) Divergent
b) 1960
a) Wavelength and spot size
b) Does not change it
d) All of the above
d) Absorption
d) All of the above
b) Eumelanin
b) Duration of time energy is applied
a) Lasers could target hair follicles
c) Photon absorber
b) Reduces side effects
c) Microwaves
d) All of the above
a) When tissue cools down
c) Diode
b) Absorption is maximized at specific wavelengths
b) Laser safety standards
c) Some energy is lost
b) Laser energy is redistributed in different directions
b) Polychromatic
b) Light skin and dark hair
c) Hair follicle
b) Preventing laser exposure to eyes
b) Joules per square centimeter
b) It cools the skin
b) Train personnel about fire hazards
b) It can cause burns and long-term damage
c) Both a and b
d) Nd-YAG
c) To ensure compliance with safety standards
b) Repeatedly exciting electrons
c) Lasing medium
a) It supports combustion
c) Same frequency and phase
b) Absorbed, reflected, scattered, transmitted
d) All of the above