sound is used in radar system.*
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Parking sensors on cars use ultrasonic (sound) waves to assist when parking. ... There are many different types of electromagnetic waves, such as infrared, X-rays and visible light. Radio waves are used for radar for a number of reasons: It is simple and inexpensive to generate radio waves using electronic components.
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No
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Only they don't use sound waves. Instead, they use radio waves or light waves, respectively
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