2 ms·
Have you ever noticed car wheels looking as if they are spinning backwards instead of forwards?
by Digit-Al 6y ago
Have you ever noticed car wheels looking as if they are spinning backwards instead of forwards?
- malingo 6y agoThis is due to the rotation rate of the structural elements of the wheels being just above the flicker fusion threshold frequency, around 60 Hz [1]. As the wheels spin faster, they just look like a blur. [1] https://en.m.wikipedia.org/wiki/Flicker_fusion_threshold https://en.m.wikipedia.org/wiki/Flicker_fusion_threshold
- Digit-Al 6y agoThanks. Very interesting.