Final answer:
On an approach to an up slope runway, the illusion makes you feel higher, which may result in a lower approach. Pilots need to be aware of this visual illusion to ensure a safe landing.
Step-by-step explanation:
On final approach to an up slope runway, the up slope will create the illusion of being higher than you actually are, resulting in a tendency to fly a lower approach.
When landing on an upsloping runway, pilots must adjust their approach to counteract the visual illusion. The slope of the runway affects the perception of altitude and can cause pilots to believe they are at a sufficient height when in fact they may be too low. Understanding the illusion of slope and how it impacts landing is essential for pilot safety.