As you drive down the highway you notice the highway signs move by relatively fast compared to the mountains. Therefore you know that the signs are closer than the mountains as a result of _______________.

Question

Quizplus · Accepted Answer

Motion parallax is the phenomenon where objects closer to the observer appear to move faster than objects further away, even though the observer is moving at a constant speed. This difference in apparent speed is used by the brain to judge distances.

As You Drive Down the Highway You Notice the Highway