North Carolina RADAR State Practice Exam

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Prepare for the North Carolina RADAR State Exam with essential insights and practice questions to boost your confidence. This comprehensive resource will guide you through the exam requirements, helping you maximize your chances of success.

Practice this question and more.

In terms of radar signal frequency, what occurs when an object is moving towards the radar?

The reflected signal has a lower frequency
The reflected signal has no frequency change
The reflected signal has a higher frequency
The reflected signal frequency is constant

The correct answer is: The reflected signal has a higher frequency

When an object is moving towards a radar system, the frequency of the reflected signal increases due to the Doppler effect. This phenomenon occurs because the moving object compresses the wavelength of the emitted radar waves as it approaches. As a result, the frequency of the radar waves that bounce back is higher than the frequency of the original emitted signal. This frequency shift can be used in various applications, such as measuring the speed of vehicles or other moving objects. The radar system detects this change in frequency and can calculate how fast the object is moving based on the degree of this shift. The options that suggest a lower frequency or no frequency change do not align with the principles of the Doppler effect, which specifically highlights that the frequency increases when the object approaches the radar source.