Phys.org  June 12, 2024 Using waves to explore our environment is a widely used paradigm, ranging from seismology to radar technology, and from biomedical imaging to precision measurements. The central aim is to gather as much information as possible about an object of interest by sending a probing wave at it and processing the information delivered back to a detector. An international team of researchers (Austria, France) demonstrated that an electromagnetic wave scattered at an object carries locally defined and conserved information about all of the object’s constitutive parameters. They introduced the density and flux of Fisher information for general […]