Speed Cameras Quiz

What technology do many types of speed cameras use to measure the speed of a vehicle?

• Magnetic fields

• Ultrasonic waves

• Radar

• Infrared sensors

What phenomenon causes the change in wavelength of reflected waves from a moving vehicle?

• Refraction

• Doppler effect

• Interference

• Diffraction

What type of waves do speed cameras emit to measure speed?

• Radio waves

• Sound waves

• Visible light

• Microwaves

What is the primary purpose of a speed camera's flash unit?

• To illuminate the road

• To dazzle drivers

• To photograph speeding vehicles

• To measure speed

What happens to the wavelength of waves when a vehicle is moving away from the speed camera?

• It remains the same

• It shortens

• It disappears

• It lengthens

What is the maximum percentage by which speed cameras can reduce average speeds according to studies?

• 10 percent

• 5 percent

• 20 percent

• 15 percent

What does LIDAR stand for?

• Light Intensity and Detection

• Laser Identification and Ranging

• Light Detection and Ranging

• Laser Imaging and Detection

What component of a speed camera detects the reflected microwaves?

• Flash unit

• Control unit

• Radar unit

• Digital camera

When were the first radar speed cameras developed?

• In the 1950s

• During World War II

• During World War I

• In the 1800s

What is the length of the microwaves emitted by a speed camera?

• About one kilometer

• About one meter

• About one millimeter

• About one centimeter