What is this close-up picture? (WotsThat: Inside a tape roll (top down))

Question

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

TerraShift · Accepted Answer

Inside a tape roll (top down). Tape rolls have been used for over a century, with the first transparent adhesive tape invented in 1930. The humble tape roll remains one of the most universally recognized objects in offices and homes worldwide, yet looking directly down into one creates a surprisingly disorienting optical illusion.

Answer: Inside a tape roll (top down)

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