N3 Study Question and answers verified
to pass
What are some of the ionizing rays? - correct answers alpha, beta, gamma
that arises from the decay of x-rays
What are the penetration abilities (from least to greatest) - correct answers
gamma, beta, alpha
What does non-ionizing radiation refer to? - correct answers energy that
cannot cause ionization but can cause harm to the other parts of the body
What is the difference in effects between non-ionizing radiation and
xray/gamma radiation? - correct answers thermal effect, no cumulative effect
What is the danger of lasers? - correct answers It can cause skin burn and
eye injury. Over exposure to UV can cause skin cancer. High intensity
ultrasound can increase tissue temperature and cause bubbles of gas or
cavities in the body
What does LASER stand for? - correct answers light amplification by
stimulated emission of radiation. A light that comes from a conventional light
source radiates in all directions and in various wavelengths that reinforces
each other
How many directions does a laser beam travel? - correct answers One
direction and in a specific wavelength, therefore, a narrow beam BUT comes
in a wide range of frequencies: infrared to UV regions
, What happens when the amplification of a laser is high enough? - correct
answers It can pass through a partially reflecting end plate
What are the 4 types of lasing system? - correct answers solid, gaseous,
semi-conductor, liquid state/organic dyes
What are the hazard classification for lasers? - correct answers By output
parameters: emission wavelength
emission duration
power output
accessible emission levels (AEL)
Properties for Class 1 lasers - correct answers Not hazardous even if all
accessible laser radiation output is directed to the pupil or focused into one
mm spot on skin for a day.
Should not have AEL of >0.39 microwatts
Properties for Class 2 lasers - correct answers Low power and low risk
Wave length range of 400-700nm
no capable of causing eye injury
Properties for Class 3 lasers - correct answers Medium-powder and
moderate-risk laser
Do not present any diffuse reflection hazard, skin hazard for unintentional
exposure or fire hazard
Serious eye injury from intra-beam viewing of direct and specula reflections
What is Class 3 lasers subdivided into? - correct answers Class 3a and Class
3b lasers
to pass
What are some of the ionizing rays? - correct answers alpha, beta, gamma
that arises from the decay of x-rays
What are the penetration abilities (from least to greatest) - correct answers
gamma, beta, alpha
What does non-ionizing radiation refer to? - correct answers energy that
cannot cause ionization but can cause harm to the other parts of the body
What is the difference in effects between non-ionizing radiation and
xray/gamma radiation? - correct answers thermal effect, no cumulative effect
What is the danger of lasers? - correct answers It can cause skin burn and
eye injury. Over exposure to UV can cause skin cancer. High intensity
ultrasound can increase tissue temperature and cause bubbles of gas or
cavities in the body
What does LASER stand for? - correct answers light amplification by
stimulated emission of radiation. A light that comes from a conventional light
source radiates in all directions and in various wavelengths that reinforces
each other
How many directions does a laser beam travel? - correct answers One
direction and in a specific wavelength, therefore, a narrow beam BUT comes
in a wide range of frequencies: infrared to UV regions
, What happens when the amplification of a laser is high enough? - correct
answers It can pass through a partially reflecting end plate
What are the 4 types of lasing system? - correct answers solid, gaseous,
semi-conductor, liquid state/organic dyes
What are the hazard classification for lasers? - correct answers By output
parameters: emission wavelength
emission duration
power output
accessible emission levels (AEL)
Properties for Class 1 lasers - correct answers Not hazardous even if all
accessible laser radiation output is directed to the pupil or focused into one
mm spot on skin for a day.
Should not have AEL of >0.39 microwatts
Properties for Class 2 lasers - correct answers Low power and low risk
Wave length range of 400-700nm
no capable of causing eye injury
Properties for Class 3 lasers - correct answers Medium-powder and
moderate-risk laser
Do not present any diffuse reflection hazard, skin hazard for unintentional
exposure or fire hazard
Serious eye injury from intra-beam viewing of direct and specula reflections
What is Class 3 lasers subdivided into? - correct answers Class 3a and Class
3b lasers
