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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

    тАв Sound waves are longitudinal mechanical waves and frequency can be defined as the number of wave cycles happening in one sec. тАв 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. тАв Examples: Bat produce Ultrasonic waves.

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