Illusions

While we are still waiting for the contest of the best illusions in 2022 here are my my all time favorites:

– for acoustics it is Yanny or Laurel – I hear Yaurel

– for optics it is the wedding dress – I see blue with black lace

CC-BY-NC Science Surf 18.01.2023, access 18.10.2025 VG Wort counter note save PDF