What illusion is associated with a downsloping, wide runway?

The correct answer relates to the specific visual illusion known as "feeling low," which is often experienced by pilots when approaching a downsloping, wide runway. This type of runway can create an optical illusion affecting altitude perception. As pilots approach such a runway, the downward slope can lead them to believe they are higher than they actually are, resulting in a false sense of height.

This illusion occurs because the visual cues provided by the runway do not align with the pilot's actual altitude. The broader perspective of the wide runway coupled with its downward slope can distort perception. As a result, pilots may misjudge their altitude and approach, potentially leading to a lower-than-desired landing point. Recognizing and understanding this phenomenon is critical for flight safety, as it emphasizes the importance of relying on instruments rather than solely on visual cues during landings on runways with such characteristics.