What illusion does a pilot experience when landing with the searchlight positioned too far under the nose?

When a pilot lands with the searchlight positioned too far under the nose of the aircraft, they can experience the Crater Illusion. This phenomenon occurs when the bright light from the searchlight creates the perception of a dark pit or depression on the runway or landing area. The pilot may interpret this bright area as a visual cue that suggests they are lower than they actually are, leading to misjudgment in their descent path during landing.

In this context, the Crater Illusion can cause pilots to alter their approach or altitude, potentially leading to a dangerous situation if not recognized. Proper understanding of this illusion is crucial for safe night operations, emphasizing the importance of correct positioning and use of landing lights.

The other options pertain to different visual illusions that do not specifically relate to the effects of light positioning during landing.