Why is it not easy to tell whether the car is stationary or moving when the lights are on in the dar

We usually judge whether an object is moving or stationary to find a reference object for comparison (such as a house, the ground or ourselves), and it is relatively difficult to find a reference object at night, especially when there is no street lamp or something, if the car is far away, it is not easy to judge whether it is moving or stationary.

When we judge whether an object is moving, due to the perspective and daily habits, we will involuntarily prefer a stationary or slow-moving object near the object as a reference object (i.e., reference).

When we can't find a "preferred reference", we will take ourselves as the center of the circle, and connect a straight line between the car (lamp) and ourselves, and judge whether the line rotates or not. If the line is spinning too slowly, we may also assume that the car is not moving. And the speed of the linear rotation is related to these factors:

Your distance from the car, the magnitude and direction of the car relative to your speed of motion.

When you stand on the side of the road during the day, the car comes from a distance, passes you and then drives into the distance, you will feel its speed from slow to fast, and from fast to slow, think about it!

...Because it's night.

But I think it's easy to judge.

It has to do with the reference within the vision

There's nothing else to refer to, and the pavement is the same.

Because for the human eye to be able to judge whether an object is moving or stationary, it must have a reference. At night, you can only see the headlights, but you can't see the surrounding references, so you can't feel the movement of the vehicle.

During the day, according to the change in the distance between the car and the surrounding scenery and buildings, it can be judged whether the car is moving or static, and at night, although the lights are on, you can't see the surrounding situation, unless there is an obvious reference in front of the lights

relative motion; Or the distance it moves is too small, which is tiny compared to the distance between you and it.

During the day, you can see the reference clearly, so you can see whether the car is coming towards you or leaving you

In the dark of night when there are no lights, even if the lights are on, you can hardly see the reference, and you can only judge by the brightness of the lights in the distance, so it is difficult to judge

Because during the day, you can use the surrounding objects as a reference object to determine whether a car is moving or still, but in the dark of night, it's not so obvious by the light source of the car alone.

Because the vision is not good at night. It's not easy to judge his speed, unlike during the day when you can see the car.

Answer: You can see the reference object clearly during the day, so you can see whether the car is coming towards you or leaving you In the dark night when there are no lights, although the car lights are on, you can basically not see the reference object, and you can only judge by the brightness of the car lights in the distance, so it is difficult to judge.

Visual differences, far away, the eyes can not accurately judge the movement and stillness of things, normal conditions.

In the dark of night when there are no lights, you can hardly see the reference object, and you can basically only judge by the brightness of the headlights in the distance. So it's hard to judge.

I've had the same situation, and I can't see the front and back of the incoming car (without the lights on).

Because it's too dark, there's no accurate reference. There is also a distance, and the binocular vision is not obvious.

Look at your own shadow, or the shadow of those in front of you.

The low beam and high beam flash each other.

Visual differences.

It's like a visual illusion.

A: During the day, you can see the reference clearly, so you can see whether the car is coming towards you or leaving you

In the dark of night when there are no lights, even if the lights are on, you can hardly see the reference, and you can only judge by the brightness of the lights in the distance, so it is difficult to judge