What is the phenomenon of double slit interference? What does it mean for the physics community?

This is a physical phenomenon, which refers to the interference phenomenon of light, natural light is affected by polarizers, polarized light will be generated, and the intensity of light will also be affected, which has great significance, so that it can promote the development of physics, and can also better study physical photon phenomena.

Double-slit interference is a physical phenomenon and it is a propagation of light. It is of great significance to the Department of Physics, because the propagation of light can be observed through such a phenomenon.

This is a quantum phenomenon that cannot be explained by classical mechanics, which is of pioneering significance to the physics community and is a landmark discovery.

The meaning of double-slit interference is as follows:

The meaning of this sentence refers to the parallel monochromatic light projected onto a baffle with two slits, the slits are very close to each other, and the light waves of the parallel light will be transmitted to the slit at the same time, and they become two wave sources that are always the same vibration situation called coherent wave sources, and the light they repented of selling is superimposed on each other in the space behind the baffle. This is called double-slit interference.

Conditions for interference to occur: Coherent light source: two columns of waves with the same frequency, parallel vibration direction, the same phase, or a constant phase difference.

Proposal of double-slit interference:

The double-slit interference experiment was first proposed by Thomas Young in the early 18th century. A beam of monochromatic light, passing through two parallel narrow double slits will project light and dark interference fringes on the light screen, which is the double-slit interference experiment.

The experiment initially proved that light is volatile, but later it turned the world upside down. Richard Feynman once said that the double-slit Hu Qianyu interference experiment is the core experiment of quantum mechanics, because the double-slit interference experiment can show the mystery of quantum mechanics.

The center of the screen is a zero-level bright stripe, and the sides are parallel and evenly spaced light and dark stripes.

The characteristics of the fringes of the double-slit interference experiment are:

1. Light and dark stripes;

2. Stripes are arranged at equal intervals;

3. The intermediate level is low;

4. There is only one zero-level clear pattern;

5. In addition to the zero level, the other levels of orange terrestrial distribution are symmetrically distributed;

6. In the case of device determination, the longer the wavelength of incident light, the greater the spacing of dust stripes.

In the Young's double-slit interference experiment, when the light source moves up and down, the interference fringes move down and up (in the opposite direction of the former).

The interference must first coherent light bypass the obstacle (in fact, diffraction) and then superimpose on each other, forming a streak of light and dark.

The double slit is vertical, horizontal, small in size, easy to bypass the light (diffraction), located on the left and right sides; Each seam, while the size of the vertical direction, is not easy for the light to go through, so there is no light up and down. Eventually, the light on the left and right sides of each vertical slit is superimposed on each other, forming light and dark stripes, of a nature and parallel seams.

Make the light that reaches the two double slits coherent.

Only when two coherent light meet can the interference be formed, the coherence of the ordinary light source is very poor (because the situation of atomic luminescence is different), if it is directly illuminated on the double slit, the interference fringes can not be seen, first let it pass through a single slit, so that the light from the single slit becomes coherent light (because it is emitted from the same line light source, so the vibration situation is the same), so that the streaks can be seen on the light screen.

If you use a laser for an experiment, you can directly irradiate the double slit and observe the interference fringes. Because the coherence of the laser is very good.

This is equivalent to two equivalent light sources with a fixed phase difference.

Young's double-slit interference experiment belongs to the sub-amplitude interference, and the idea is to guarantee.

Two equivalent light sources with a fixed phase difference.

What is the secret of the "double-slit interference experiment"? Duration 5'17"

The principle of Young's double-slit interference is the superposition of light waves. Light waves explain the phenomenon of interference. Illuminate the opaque shutter with a strong monochromatic light with a small hole S on the top and a small hole S1 and S2 on the back.

Young explained the experiment with the Huygens Apo hypothesis of light propagation.

S1 and S2 are exactly the same line light source, p is at any point on the screen, this is the intersection of x, the rl and r2 of the rows s1 and s2 are far away from s1 and s2, the distance between the double slit is d, and the distance between the double slit and the screen is l.

Dr2 R1 dsin shell DX lsin tg, because the distance between the two slits is much lower than the distance from the screen, δ r2 r1 dsin shell dx lsin tg, this is because at a small angle it can be considered approximately equal.

The position of the interference bright stripes can be greatly conditional kd :x (l d)k, and the position of the dark stripes can be the lowest condition d (k 1 2) :x (d d)(k 1 2) between the bright fringes and the distance between the black stripes is:

x＝λ（d／d）。