Is everything you see through a transparent object a real image? Physics masters

Not what people see through the eyes is through the lens that distorts the image projected onto the retina.

It's just that the position of the actual object and the object seen by the human eye is very small, so what the human eye sees is the public default to the "real image".

This question is to be judged by the definition of reality and illusion. The real image refers to the place where the light emitted by the object really arrives and is seen by the human eye, that is, what the person sees is the real light at the position where the person thinks it is the image, and the virtual image is usually refracted or reflected at the two interfaces, and the path is deflected when it enters the human eye, and the human eye always feels that the light is propagating along a straight line, so the light entering the eye is extended in reverse, so the image seen at this time is actually that there is no real object emitting light there, but the human eye does receive the light.

So, the answer is no.

Except for the small hole image, which is a real image, the others are virtual images.

There are four principles of the principle:

1.Opacity due to the blocking action of free electrons: This is the reason for the opacity of metals.

2.Opacity caused by substances that can absorb light: the excitation energy of the electrons of the molecules of such substances is relatively low, just in the visible light range, and the molecules often have benzene rings, benzoquinones, benzidine or other conjugated system structures, which can reduce the excitation energy of electrons, so that the electrons are prone to transition and absorb the energy of photons, so that the light is absorbed, so that it is transparent.

3.Opacity caused by the destruction of the structure of a transparent substance: for example, glass is transparent, while glass powder is opaque; Ice is transparent, and ice is opaque when it is smashed, if the structural characteristics of a substance do not meet the above two reasons, then it is a substance that can pass through light, but if there are many small voids in its structure, then it is white, which is the reason why white objects are not transparent.

4.If there are no free electrons in the structure of a substance, and there are no electrons that are easy to excite, and the structure of the substance is very compact, there are no pores and other conditions, then the substance can pass through photons, that is, it is transparent.

In addition, visible light is actually only a small part of electromagnetic waves. In addition to visible light, there are gamma rays, infrared, ultraviolet rays, long-wave medium-wave, short-wave microwaves, etc., in fact, these are electromagnetic waves. Things that can block visible light sometimes can't block electromagnetic waves in other bands, such as wooden doors and cabinets, which are completely transparent to mobile phone signals.

UV-resistant glass, on the other hand, is completely transparent to visible light and completely opaque to ultraviolet wavelengths. In other words, whether the arrangement and combination of atoms or molecules of a substance happens to be at the same frequency or multiple of the same frequency as a certain band. If you are the same, you may be transparent, and if you are different, you may be opaque, and if you are a little close, then it will be translucent.

An important reason: no matter how solid a substance is, if you look at it from the inside of the atom, it is actually empty. Because inside the atom, the nucleus.

and the volume of electrons add up to less than 10000000000 of the volume of an atom. Moreover, there is no evidence that atomic nuclei and electrons cannot be passed through by photons! So, transparency is normal!

To understand this complex question, we must first ask the following question: Why are some substances opaque?

For opaque substances, we can divide them into four main categories:

1. Due to free electrons.

Opacity due to the blocking effect: This is the cause of the opacity of the metal.

2. Opacity caused by substances that can absorb light: the excitation energy of the electrons of the molecules of such substances is relatively low, just in visible light.

range, there are often benzene rings in the molecule.

The structure of benzoquinone, benzidine, or other conjugated systems that can reduce the excitation energy of electrons, making them prone to transitioning and absorbing the energy of photons. In this way, the light is absorbed.

3. Opacity caused by the destruction of the structure of the transparent substance. For example, glass is transparent, while glass powder is opaque; Ice is transparent, whereas ice is opaque when it is smashed. If a substance does not conform to its structural characteristics, then it can pass light, but if it has a lot of small voids in its structure, then it is white.

This is the reason why white objects are opaque.

The result of a mixture of causes. The opacity of many objects in reality is caused by this.

If there are no free electrons in the structure of a substance, there are no easily excited electrons, and the structure of the substance is very compact, and there are no many pores and other conditions. That matter can pass through photons, i.e. it is transparent. So the glass is transparent!

The reflection and refraction of light, if the light is reflected and then refracted proves to be a transparent object, and vice versa, it is an opaque object.

The color of an object seen by the human eye is the color of the light reflected (or transmitted) to the human eye by the object itself. We divide light into red, orange, yellow, green, blue, and purple.

There are seven kinds, and whichever light enters the human eye, the human eye sees which color, and if there are none of the seven lights, it sees black. Conversely, if you have both, you will see white.

The color of a transparent object is also the color of the light it can transmit, when the human eye looks at the object, only a certain color of light passes through the object, and other colors of light are absorbed by the object, so the human eye can only see the color of the transmitted light.