The phi phenomenon is related to

• A. stroboscopic motion.
• B. the Müller-Lyer illusion.
• C. the Hermann grid.
• D. relative size.

Answer: (A)

Verified step by step guidance

1. Understand the concept of the phi phenomenon: It is a perceptual illusion where stationary objects shown in rapid succession appear to move. This is a key concept in understanding how we perceive motion.
2. Recognize that the phi phenomenon is closely related to stroboscopic motion, which is the perception of motion produced by a series of short or instantaneous samples, as opposed to continuous observation.
3. Differentiate the phi phenomenon from other visual illusions such as the Müller-Lyer illusion, which involves the misperception of the length of lines, and the Hermann grid, which involves seeing spots at the intersections of a grid.
4. Consider the concept of relative size, which is a different perceptual phenomenon where the size of an object is perceived in relation to other objects, and is not directly related to the phi phenomenon.
5. Conclude that the phi phenomenon is specifically related to stroboscopic motion, as both involve the perception of motion from a sequence of static images.