Final answer:
MRI, radiation/television signals, and GPS are applications of physics involving the use of electromagnetic waves. MRIs use radio waves to generate detailed images of the body, and are considered a safe imaging technique without ionizing radiation.
Step-by-step explanation:
Radiation/television signals, GPS (Global Positioning System), and MRI (Magnetic Resonance Imaging) are all practical applications of physics, specifically involving electromagnetic waves. Television signals and GPS use radio waves to transmit information, while MRI uses radio waves to create detailed images of the body's interior. MRI is a powerful medical imaging technique that works by broadcasting radio waves that are absorbed and reemitted by the body's nuclei, primarily hydrogen protons.
These emit signals that are captured to construct detailed two- and three-dimensional images of the body's internal structures, making MRI a vital tool for diagnosis and treatment planning. Unlike some other imaging techniques, MRI uses no ionizing radiation and is generally considered safe for patients.