The ability is see is fundamental to our very existence. How true our
perceptions really are depends upon many factors, and not least is our
understanding of what light is and how it interacts with matter. It was
said that the camera, the icon of light recording instruments, never
lies, and in the day of the glass plate and celluloid roll-film this
might well have been true. But in this modern era, with electronic
cameras and computer software, it is often safe to assume that the
camera always lies. The advertising images that bombard our every waking
moment are manipulated in shape, profile, color, and form. In this new
era, light can be manipulated with metamaterials to make one object look
like another or even cause that objects to vanish, literally before our
eyes; not only can the image we see be manipulated, but so can the light
itself.