ABSTRACT
Cloaking can be seen as a look-alike contest: The goal is to make
some object A appear like another object B with respect to some physical observable. The early literature has indeed spoken of
the nonuniqueness of the tomography problem [9, 27, 41]. The
experiments to be discussed in this chapter concern the observables
light, sound, elastic waves, static elasticity, electric conduction, heat
conduction, and particle diffusion.
