What is this close-up picture? (WotsThat: Vinyl record groove (macro))

Question

What object is shown in this zoomed-in close-up photo?

ChalcopyritQ · Accepted Answer

Vinyl record groove (macro). Vinyl record grooves are precisely engineered spirals that can contain over 1,500 turns on a single LP. The needle riding these microscopic valleys vibrates at frequencies up to 20,000 Hz, translating physical undulations into the rich analog sound that audiophiles still cherish today.

Answer: Vinyl record groove (macro)

More industrial close-ups