GCSE Physics - Ultrasound #74

The video explains ultrasound, sound waves with frequencies above 20,000 Hertz, and its applications. Ultrasound is naturally produced by animals like bats for echolocation, while humans use electrical devices to generate it. The video covers how ultrasound waves interact with different mediums, reflecting and refracting at boundaries, which is used in medical imaging, industrial quality checks, and sonar. In prenatal scanning, ultrasound helps visualize fetuses, while in industry, it detects faults in products. Sonar uses ultrasound to measure distances underwater, such as from submarines to the sea floor.

What new insight or understanding did you gain from this video?