Why does the windshield appear to move slowly?

[LeKimberly]

The reasons why the windshield appears to move slowly include angle influence and distance effect. The specific explanations are as follows: Angle influence: Close one eye. When a long stick aligns with the central line of your vision in front of you, you can only see the end of the stick and have no idea how long it is. When the stick forms a certain angle with your line of sight, you can recognize it as a stick, but still cannot accurately perceive its actual length—it appears shorter, and the smaller the angle, the shorter it seems. Only when the stick is perpendicular to your line of sight can you fully perceive its true length. Distance effect: The closer an object is, the greater its angular velocity; the farther it is, the smaller the angular velocity (linear velocity is like the base of an isosceles triangle, distance is the height of the triangle, and the angle at the vertex relative to the base represents angular velocity. Clearly, if the base length is the same but the height differs, the vertex angle will be completely different). For example, when flying in an airplane at high speed, objects on the ground appear to move very slowly because the distance is too great, resulting in a very small angular velocity.