What are false reflections observed at multiple distances from the initial reflection called?

False reflections observed at multiple distances from the initial reflection are known as ghosts. This term is used in various contexts, particularly in fiber optics and acoustics, to signify unwanted signals that can confuse the interpretation of data or images. Ghosts can appear due to various reasons, such as interferences, multi-path propagation, or imperfections in the fiber optic medium itself, which can lead to misleading information in signal analysis.

In the context of fiber optics, understanding ghosts is crucial as they can degrade the performance of optical networks by causing additional noise and reducing the clarity of the transmitted signal. Recognizing ghosting phenomena allows for troubleshooting and improving the reliability of fiber optic installations, making it an important concept for technicians and installers in the field.