NC RADAR/LIDAR RECERT | COMPLETE QUESTIONS
WITH 100% RATED CORRECT ANSWERS | GRADED
A+ | 2025
20 mph has how much of a reaction time - ( answer)-
minimum lidar operator class hours - ( answer)-10 hours, not to exceed 4 weeks.
requirement to become a lidar operator - ( answer)-must be employed as leo and have
probationary or general certification, must be certified radar operator.
lidar operator class hours must be completed - ( answer)-100%
what % in setup and test for accuracy is required for lidar operator? - ( answer)-100%
lidar operator state test minimum passing score - ( answer)-70%
lidar operator certification runs concurrently with what? - ( answer)-radar certification
lidar recert class minimum hours - ( answer)-4 hours not to exceed 1 week
lidar recert minimum test score to pass - ( answer)-75%
what is the basic goal of police work? - ( answer)-to protect live and property of public
lidar is considered only a what? - ( answer)-tool
the overall course goal is what? - ( answer)-to impose effectiveness of speed
enforcement through the proper and efficient use of smi's
what is the target of almost all successful challenges? - ( answer)-human error
what lidar mean? - ( answer)-light detection and ranging
what mode in the u.s. is lidar used in? - ( answer)-stationary only
- ( answer)-laser energy is generated by sandiching a piece of active material (lasing
medium) between two mirrows. the mirrors and medium form an optical resonator. the
atoms of the lasing medium are put into an excited state by an external energy source.
these atoms can be stimulated to release their stored energy as light energy when
another light source interacts with the atoms. this results in application of the incoming
light source. by positioning the two mirrors of the optical resonator exactly the right
distance apart, a standing wave is formed by only those waves bouncing between teh
mirrors adn having the proper wavelength.
, what materials can produce lasers? - ( answer)-solids, liquids and gases
what type of laser does a traffic lidar device use? - ( answer)-semi-conductor
what method does lidar employ for taking measurements to determine a vehicle speed?
- ( answer)-time of flight method
what does lidar transmit - ( answer)-dozens of laser light pulses per second.
what happens when a pulse is transmitted? - ( answer)-the timer starts, and when the
reflected pulse returns, the timer is stopped. the elapsed time along with the speed of
light (186,000 miles/sec constant) calculates the range to the target. after taking several
successful measurements, the data is analyzed by using an algorithm. the target speed
is determined by a group of time range measurements.
even though time/distance is employed, are reference points needed? - ( answer)-no
what does a short wavelength mean? - ( answer)-a higher frequency. (the shorter the
wavelength, the higher the frequency)
how is a wave length measured? - ( answer)-the distance from the beginning of a peak
to the end of a valley or the distance between two points in a periodic wave that have
the same phase. 904-905 nm(nanometer=one billionth of a meter).
frequency = - ( answer)-330 terahertz or 330 trillion waves per second.
one cycle = - ( answer)-one wave= hertz(hz)
how far does light travel? - ( answer)-indefinitely unless reflected, refracted or absorbed.
what colors do and do not reflect well? - ( answer)-darker color vehicles do not reflect
light as well as lighter color vehicles. it may affect the range but not the accuracy
how far apart is the lidar beam at 1000 ft? - ( answer)-approximately 3-4 feet (1/100th of
average radar)
should you measure speed at 1000 ft or greater? - ( answer)-it is not recommended that
lidar be used to measure distances of 1000 ft or greater.
should the lidar be used through glass? - ( answer)-it is not recommended that lidar be
used through glass that is not at a 90 degree angle.
what is the angular effect for lidar? - ( answer)-always to a motorist's advantage
WITH 100% RATED CORRECT ANSWERS | GRADED
A+ | 2025
20 mph has how much of a reaction time - ( answer)-
minimum lidar operator class hours - ( answer)-10 hours, not to exceed 4 weeks.
requirement to become a lidar operator - ( answer)-must be employed as leo and have
probationary or general certification, must be certified radar operator.
lidar operator class hours must be completed - ( answer)-100%
what % in setup and test for accuracy is required for lidar operator? - ( answer)-100%
lidar operator state test minimum passing score - ( answer)-70%
lidar operator certification runs concurrently with what? - ( answer)-radar certification
lidar recert class minimum hours - ( answer)-4 hours not to exceed 1 week
lidar recert minimum test score to pass - ( answer)-75%
what is the basic goal of police work? - ( answer)-to protect live and property of public
lidar is considered only a what? - ( answer)-tool
the overall course goal is what? - ( answer)-to impose effectiveness of speed
enforcement through the proper and efficient use of smi's
what is the target of almost all successful challenges? - ( answer)-human error
what lidar mean? - ( answer)-light detection and ranging
what mode in the u.s. is lidar used in? - ( answer)-stationary only
- ( answer)-laser energy is generated by sandiching a piece of active material (lasing
medium) between two mirrows. the mirrors and medium form an optical resonator. the
atoms of the lasing medium are put into an excited state by an external energy source.
these atoms can be stimulated to release their stored energy as light energy when
another light source interacts with the atoms. this results in application of the incoming
light source. by positioning the two mirrors of the optical resonator exactly the right
distance apart, a standing wave is formed by only those waves bouncing between teh
mirrors adn having the proper wavelength.
, what materials can produce lasers? - ( answer)-solids, liquids and gases
what type of laser does a traffic lidar device use? - ( answer)-semi-conductor
what method does lidar employ for taking measurements to determine a vehicle speed?
- ( answer)-time of flight method
what does lidar transmit - ( answer)-dozens of laser light pulses per second.
what happens when a pulse is transmitted? - ( answer)-the timer starts, and when the
reflected pulse returns, the timer is stopped. the elapsed time along with the speed of
light (186,000 miles/sec constant) calculates the range to the target. after taking several
successful measurements, the data is analyzed by using an algorithm. the target speed
is determined by a group of time range measurements.
even though time/distance is employed, are reference points needed? - ( answer)-no
what does a short wavelength mean? - ( answer)-a higher frequency. (the shorter the
wavelength, the higher the frequency)
how is a wave length measured? - ( answer)-the distance from the beginning of a peak
to the end of a valley or the distance between two points in a periodic wave that have
the same phase. 904-905 nm(nanometer=one billionth of a meter).
frequency = - ( answer)-330 terahertz or 330 trillion waves per second.
one cycle = - ( answer)-one wave= hertz(hz)
how far does light travel? - ( answer)-indefinitely unless reflected, refracted or absorbed.
what colors do and do not reflect well? - ( answer)-darker color vehicles do not reflect
light as well as lighter color vehicles. it may affect the range but not the accuracy
how far apart is the lidar beam at 1000 ft? - ( answer)-approximately 3-4 feet (1/100th of
average radar)
should you measure speed at 1000 ft or greater? - ( answer)-it is not recommended that
lidar be used to measure distances of 1000 ft or greater.
should the lidar be used through glass? - ( answer)-it is not recommended that lidar be
used through glass that is not at a 90 degree angle.
what is the angular effect for lidar? - ( answer)-always to a motorist's advantage
