sean eng™
invisible
Invisibility by environment
An object may be classified as "invisible" if it cannot be noticed by use of sight due to environmental factors other than the fact that it doesn't reflect light. An object that might normally be seeable may be classified as invisible if it is:
* Behind an object.
* The same colour or pattern as the background. (Camouflage)
* Patterned so that its outline is hard to determine.
* In an environment which is too dark or too bright.
* In a particular observer's Blind spot (outside that observer's line-of-sight).
invisible
Invisibility by environment
An object may be classified as "invisible" if it cannot be noticed by use of sight due to environmental factors other than the fact that it doesn't reflect light. An object that might normally be seeable may be classified as invisible if it is:
* Behind an object.
* The same colour or pattern as the background. (Camouflage)
* Patterned so that its outline is hard to determine.
* In an environment which is too dark or too bright.
* In a particular observer's Blind spot (outside that observer's line-of-sight).