Scotch tape screeches because it’s making tiny sonic booms
Unwind a roll of Scotch tape inside a vacuum and it gives off X-rays — enough to capture a fuzzy image of a lab member’s finger. UCLA physicists demonstrated this in 2008, vindicating a claim Soviet scientists had made (to widespread disbelief) back in 1953. The effect requires a perfect vacuum, so your desk tape isn’t irradiat…
