People
In the early 1960s, developed Gray scale imaging
This allowed 8 shades of gray to be used in imaging instead of the previous black and white imaging.
Dr. George Kosoff
In the mid-1950s, he was from Scotland and produced the first sonographic image. The image was a fetus.
Dr. Ian Donald
Discovered Sonar, used during World War I to detect ships and submarines.
Paul Langevin
Discovered the Piezoelectric effect.
This effect states that some materials will transform one form of energy into another. Quartz was used.
Pierre Curie