Which illusion is exemplified by two lines of equal length, where the one with outward-pointing wings appears longer?

The correct response is the Müller-Lyer illusion, which illustrates how our perception of length can be influenced by the surrounding visual context. In this specific illusion, two lines of equal length appear differently due to the addition of arrow-like tails — one line features arrows pointing outward, while the other has arrows pointing inward.

Our brain interprets the lines in relation to the angles created by these arrows. The outward-pointing wings create an impression of greater distance, leading the viewer to perceive that line as being longer, even though the lines are identical in size. This phenomenon highlights the role of Gestalt principles, where context and spatial relationships can alter our sensory perception, showcasing the complexity of how we process visual information.

This effect is particularly intriguing because it demonstrates the disconnect between physical reality and our perceptual experience, emphasizing the influence of learned visual cues in interpreting depth and size.