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Anonymous users2024-02-08The average person has a pair of eyes, and in terms of their structure, they can sense two two-dimensional images from different perspectives. But further, the ciliary muscles of the eye.
The lens can be controlled.
to adjust the focusing distance. Theoretically, then, if there are some high-frequency targets (such as clear text), a single eye can detect the distance by focusing on it. This can be considered the third dimension of depth, but this information can only be used to represent a very rough depth in the focal plane.
In addition, the visual signal is processed in the visual cortex, which allows parallax to be used for overlapping visual fields.
Parallax) produces stereopsis, which adds depth perception information to two-dimensional images.
Light rays enter the eye through the cornea and lens, which focuses the image on the retina.
Surface. On the retina, even if the object is three-dimensional, the image presented is two-dimensional. These images are transmitted to the brain's visual cortex and recognized, for example, the brain thinks:
Oh, I recognized it as a door", thus re-transforming the two-dimensional image into a three-dimensional object.
For a long time, many people have believed that the world we see with our eyes is a two-dimensional or three-dimensional space, and from this, we have also inferred that we humans are three-dimensional creatures. But what dimensions do our eyes see? Let's first recognize the light we see with our eyes.
Now we all know optical fiber communication, which is communication that carries information through light. There is also a cell phone signal that is an electromagnetic wave.
These electromagnetic waves also carry information. In other words, light or electromagnetic waves themselves carry information. And what we see with our eyes is the light that carries the message.
Speaking of information, what do you think? Information itself is a combination, like many numbers together to form a line and plane.
Many words form an expression, and information is a combination of these expressions. This information can be expressed in three dimensions, and many more are not three-dimensional. Another characteristic of information is that it can be digitized, our mobile phones and computers are a combination of numbers, these numbers themselves are zero-dimensional, but they are combined to form different dimensions.
Some numbers are combined into three dimensions, and many more are made up of other dimensions. Two different points can determine a straight line, and two different numbers can determine a straight line, some of which are three-dimensional spaces.
, most of the lines are not in three-dimensional space. How do we know that a straight line exists, but not in three-dimensional space? Let's take a few examples that we often recognize.
Time is a number, and there are different points in time. So you can determine a straight line at different points in time, and this straight line is the timeline.
Is it not in three-dimensional space? Many people believe that every dimension has time, and others believe that it exists in three-dimensional space. Let's see how the timeline relates to 3D. <>
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Anonymous users2024-02-07Four-dimensional space is defined as three-dimensional space + time axis, and "three-dimensional space + time dimension" is another way of saying it. The former is not a four-dimensional space-time, and the four-dimensional space-time itself is a pseudo-concept. It's very simple "Time is just a concept that appears because of the motion of particles and the expansion of the universe, why can it become the fourth dimension" In addition, there is a difference between the concepts of space-time and four-dimensional space The statement that four-dimensional space is defined as three-dimensional space + time axis is a misunderstanding of the concept of Minkowski space, and why is this misunderstanding so widespread?
It's very simple, countless science fiction ** and even popular science books deliberately apply such a thing, causing a wide range of readers. This involves a set of four-dimensional vector fields, i.e., four-dimensional vectors are distinguished by the positive and negative signs of their (Minkowski) inner product.
Three-dimensional space.
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