Which describes a phonograph recording?
A tiny magnet induces an electric current.
The spiral contains pits and flats.
The spiral has pieces of code that represent sound.
Flashes of light become pulses of current.
The correct answer is: The spiral contains pits and flats.
Phonograph recording involves a spiral groove containing pits and flats that represent the sound waves. As the stylus moves through the groove, it vibrates and these vibrations are converted into an electric current that can be amplified and played back through a speaker.