DEFINED
A change in the direction of a sound or light wave at the edge of and caused by an obstacle in its path.
“deviation of the direction of propagation of radiation, determined by the wave nature of radiation, and occurring when the radiation passes the edge of an obstacle” CIE
IN USE
The interference of a body or object in the path of a light wave.
A material trace and component of ‘spectral testimony’ (Schuppli, 2020). A process of registration.
A record of history:“When light passes through slits, the light rays that pass through are broken up. And if you have a screen at one end to register what happens, what you get is a record of passage of the light rays onto the screen. This “record” shows the history of their passage through the slits. So what you get is not a reflection; it’s the record of history.” Donna Haraway
An intimate architecture between a wave and body.