Final answer:
The black dots in a fiber optic light cable indicate damaged fibers.
Step-by-step explanation:
The black dots in a fiber optic light cable indicate damaged fibers.
In fiber optics, light is transmitted through optical fibers using the principle of total internal reflection. The cladding surrounding the fibers prevents light from being transmitted between fibers in a bundle. If there are black dots on the cable, it means that some of the fibers are damaged and the light is not properly transmitted through them.
It is important to identify and replace the damaged fibers to ensure a successful transmission of light and maintain the quality of the image or signal being carried by the fiber optic cable.