Why can't you peek across the door?It turns out that "ghost" can be seen through the door seam

Vibration vector angle is 150 °

Vibration vector angle is 60 °

Therefore, a light and dark stripes appear on the light screen

Ultimate treasure

The above three exclusive cheats can dispel 99.9999%of the ghosts. If you are still scared, then the editor can only take out the ultimate treasure of the bottom of the box (I don’t tell him ordinary people)

If you put an electronic gun at the S1, what will it be on the F screen?

To master the ultimate treasure, you need to understand a few basic principles.

In the micro world, the probability P equal to the wave function (probability amplitude) of the incident (probabilistic amplitude) ψ Modang ψ:

The state of the micro system can be represented by a vector (Dirac symbol), and its symbol is called the right vector.

Assuming that an event is expressed by "transition from the beginning I to the end of F", the probability of this transition may be expressed as:

That is, the probability amplitude of the transition from i -F -state transition is equivalent to ψ

If the transition from I to F state must pass through a middle state V, then the overall transition probability amplitude is equal to the segmented probability amplitude:

Probability amplitude superposition rules: If there is a transition between I and F -state, there are several physical and irrelevant ways, then the transition probability amplitude in I → F should be the sum of various possible transition probability amplitudes. (N represents n transition methods):

Master the above rules, let's look at the electronic interference pattern again.

Assuming that the seam B or C separates separately, the probability of the electrons on the screen is:

If B and C are opened at the same time, because the seams will be passed from the seams that cannot be distinguished, the probability amplitude is used to superimposed the rules. Then the probability of transition is:

It can be seen that IBC IB+IC, the interference items of the two possible transition probability amplitude from the beginning to the end of the electrons, causing the image of interference.

After the exorcism ceremony is over, you can sleep peacefully! The courageous friends Xiaobian will teach a set of soul -recruiting skills, be a boss, and let the ghost work for you! (The timid friends can directly draw to the end ~) Interference instrument

The cycle of interference in light and dark changes in the length of light waves (hundreds of nanometers), and can obtain the phase information of the optical wave through the easier measurement amplitude (brightness), so the interference phenomenon can be used for more precise measurement!

Michaelson interference instrument

The picture above shows the Michaelson interference instrument. The light emitted by the light source S is divided into two beams of light with the same strength (transmitted light 1 and reflex light 2) with the same strength (semi -transparent and half anti -membrane). Two beams of light They are incident vertically to the full reflector M1 and M2, respectively. After reflection, they return to G1 of the spectroscopy, and then pass through the transmission and reflection, and reach the observation area E and interfere. G2 is a compensation board to ensure that the reflexual light is equal to the number of times of the transmission light passing through the glass plate.

Land measurement: Move full anti -mirror M2, light beam 2 changes, and interferery stripes have corresponding movements. According to the number of stripes, the length can be accurately compared or measured. The Michaelson interference instrument and Fabri-Pero interference instrument have been used to express international rice with the wavelength of cadmium red spectrum line.

Refractive index measurement: The geometric journey of the beam remains unchanged, and the changes in the refractive index will also cause changes in the optical range, so that the interference stripes will move. Through this principle, the refractive index can be achieved. The refractive index is relatively measured.

Ruili interference instrument structure

Optical component quality inspection: The Taiman interference instrument is generally used to test the quality of optical elements such as tablets, prisms and lenses. Placing optical elements to be checked in a optical path of the interference instrument. The refractive index of optical elements or uneven geometric dimensions will cause small changes in the optical range at different positions of the same beam of light, which eventually leads to the deformation of interference stripes. If a lens is placed in the light path, you can understand the wave surface distortion caused by the lens according to the interference pattern, so as to evaluate the wave image difference of the lens.

Interference striped bending

Gravity wave detection: The interference instrument used by laser interference Gravity wave Observatory (LIGO) is Michaelson interference instrument. Under normal circumstances, the interference arm of different lengths will have different responses to the same gravitational waves. When the gravitational wave comes, the two arms are extended by each other with the characteristics of the gravitational wave, and the other is shortened. From the beam emitted from the laser, after spreading a distance, the reflection of the reflex mirror is reflected back to the original point. If the two beams of light vertical in the direction are affected by the gravitational wave during the back and forth, the light range will change, which will be reflected in the interference stripe Change.

Ligo detector schematic diagram

A second pulse

With the development of super fast and super laser, people's understanding of the micro -world is getting deeper and deeper. Studying electronics' ultra -fast movements can broaden people's understanding of molecular and atomic dynamics processes. The time scale of electronic movement is in A second order. If you want to detect the electronic movement, you need A second -level detection light source. For the process of using high -second harmonics, people can get A second -level light sources.

The high -second harmonic is essentially a natural A second pulse sequence, which contains a series of A second pulse. The different aspects of the different A second pulse in the high -second harmonic waves are different, and the occasional harmonics are related.

High -second harmonic spectrum spectrum

Reference materials:

[1] Liang Yanting. Physics Optics-Revised Book [M]. Machinery Industry Press, 1987.

[2] Yang Fujia. Atomic Physics. 4th edition [M]. Higher Education Press, 2008.

[3] Zhou Shixun. Quantum mechanics tutorial-2nd edition [M]. Higher Education Press, 2009

[4] Huang Hongyong. Gravity wave essence and its detection principles and detection technology [J]. Technology Innovation Guide Report, 2019, 16 (29): 3. 3.

[5] Xie Baichuan. Research on the selection method of non -total -line high harmonics and A second pulse selection [d]. Xi'an University of Electronic Science and Technology.

[6] Interference instrument_baiDu.com (baidu.com)

[7] AM P. The Principles of Quantum Mechanics. /-4th Ed [M]. The Clarendon Press, 1958.

Edit: lychee jelly

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