How does Parallax effect occur? What is parallax?

Parallax effect is a visual phenomenon that plays tricks on our perception of motion. As the plane gracefully cruises above the tranquil sea, the lack of nearby reference points comes into play.

The apparent stillness or slow-motion effect is a product of the relative motion between the plane, the observer, and the background.
The parallax effect occurs when objects at varying distances move at different rates relative to the observer. In this scenario, the sea, being a vast and uniform background, lacks the distinct reference points needed to gauge the plane's speed accurately. Consequently, the plane seems to float leisurely, creating a serene spectacle against the sea's expansive canvas.

Sarah Nelson, an aerospace educator and the director of the NASA lowa Space Grant Consortium at lowa State University, sheds light on this optical illusion. She explains that our brains rely on surrounding objects to judge motion. Without these cues, such as buildings, trees, or mountains, the plane's movement becomes challenging to perceive accurately

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