Sound Waves and Ultrasound | GCSE Physics Practice
Sound waves are longitudinal waves that require a medium to travel through.
What frequency defines the start of ultrasound?
What is Sound Waves and Ultrasound | Practice?
"Sound waves with frequencies above the human limit of hearing (20,000 Hz)."
Which of these is an example of a longitudinal wave?
If an object absorbs more radiation than it emits, its temperature will ____.
Arrange these EM waves in order of INCREASING energy: Radio, Visible, UV, Gamma.
The distance between the same point on two adjacent waves is called the ____.
Hearing Limits
Human hearing range: 20 Hz to 20,000 Hz.
Ultrasound: Frequencies above 20,000 Hz.
Ultrasound is partially reflected at boundaries between different densities.
Medical imaging and industrial flaw detection use these reflections.
Application Fact: Ultrasound is non-ionising, making it much safer than X-rays for prenatal scanning.
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