| 摘要 |
An elongate element such as a length of nylon cord or fiber optic cable is provided with means attached to at least one of its ends and operable to rotate or otherwise move the same. The moving elongate element is illuminated by illuminating means operable to vary the color of illuminating light either independently of, or in dependence on, the speed of movement of the said elongate element thereby to obtain a constant or varying visual effect.
|
