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    Question

    Which device uses ultrasonic waves for getting images of

    internal organs of human body?
    A X-ray machine Correct Answer Incorrect Answer
    B CT scanner Correct Answer Incorrect Answer
    C MRI scanner Correct Answer Incorrect Answer
    D Ultrasound scanner Correct Answer Incorrect Answer

    Solution

    • Sound waves are longitudinal mechanical waves and frequency can be defined as the number of wave cycles happening in one sec. • Ultrasonic waves or Ultrasound waves: The sound frequency above 20,000Hz (upper audible limit of human hearing) is known as ultrasonic waves. Humans cannot detect it too. • Examples: Bat produce Ultrasonic waves.

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