Magnetic used in modern technology
Ultrasound was first used for clinical purposes in 1956 in Glasgow. Tom Brown developed the first prototype systems. By the 20th century ultrasiund was used as a big part for pregnancy. One way thar electromagneric are used in modern medica is in the ultrasound. Ultrasound imaging involves bouncing "ultrasonic" sound waves — above the audible range of human hearing — at body structures or tissues, and detecting the echoes that bounce back.