O1-32: DARK AXLE
- ID Code: O1-32
- Purpose: Demonstrate the dark axle illusion.
- Description: A loop of metal rod is illuminated as it is rotated rapidly about a diameter. The vertical diameter of the loop appears to be darker than the rest of the area, which appears as a dimly lighted disc.
- Availability: Available
- References: http://lecdem.physics.umd.edu/images/refs/refso.htm#O1-32
- Loc codes: O1, D1, LS2