AI reviewed · sources pending. Book associations have not been verified.
Physical and perceptual space
ConceptPhysical spatial relations are distinguished from viewpoint-dependent spaces of experience.
Explanation or usage
An object's apparent shape can change with perspective, while measurements can describe relations among physical objects. The concept distinguishes physical space from viewpoint-dependent spaces of sight or touch. Physical objects are not identical to each of their appearances, even though those appearances may correspond to them.
Common misunderstandings
Different appearances force contradictory physical measurements.
In The Problems of Philosophy
General context reviewed · book attribution and sources pending
A circular coin viewed obliquely may appear oval. This illustrates how an object's visual appearance can depend on viewpoint while its physical shape is considered separately.