phantom indication मीनिंग इन हिंदी

To avoid phantom indications the design makes use of a special inverted toric lens ( i . e . a single clear Fresnel lens mounted step sides outwards ) with a portion of the lens steps painted black.
Lamps with inverted half toric optic lenses, covered with a light yellow tinted conical cover glass with a frosted tip to avoid phantom indications were displayed in rows of three, corresponding to the positions of a semaphore blade.