An incandescent light bulb converts electricity into light by sending electricity through a filament, and fiber optics works by carrying light along hair-thin filaments of glass. Given these facts, an incandescent light bulb converts electricity into light by sending electricity through what among the following options:
- hair-thin molecules
 - hair-thin spokes
 - epidermis and dermis
 - hydrogen and oxygen
 - activation energy
 - an electron lens
 - hair-thin hairs
 - hair-thin fibers of glass


 

        hair-thin fibers of glass 