I Have a Store In the World of American Comics

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When he repeated a certain word in the hunter's words, a flash of light suddenly flashed in his mind, and then Zhou Wenwen thought of what he had said in the book, and suddenly became excited.

Because it really can happen! Of course, many people may not have heard of this experiment.

"Nobili ring experiment," Zhou Wenwen said suddenly.

The hunter was about to continue to persuade the master at this time. Hearing the master's words, the whole person was stunned for a moment, and then fell into silence in response.

Zhou Wenwen went on to explain, "In the Nobili ring experiment... (omitting the N segment) All in all, the Nobili ring experiment is in the oxidation process of the electrolytic object, through the principle of thin film interference, in the object manufacturing process Make a few circles."

Assuming that a beam of light waves is irradiated on the film, due to the difference in refractive index, the light waves will be reflected by the upper interface and the lower interface of the film, respectively, and new light waves will be formed due to mutual interference. This phenomenon is called thin film interference.

A soap bubble is a film, but its surface thickness is not uniform. While light is made up of red, green, and blue light waves, the different colors are reflected off the surface.

Light is a wave, and light waves of different colors have different wavelengths. When a light wave hits a translucent film, part of the light is reflected back by the top surface, another part is reflected back by the bottom surface, and the rest is transmitted.

A blue light hits the surface of the soap bubble. You can see that part of the light is reflected back by the top surface, another part is reflected back by the bottom surface, and the rest is transmitted. At this position, the thickness of the soap bubble corresponds to the length of the wave, so that the light waves reflected from the upper and lower surfaces are perfectly stacked, forming a very strong blue reflected light.

Assuming that the red light hits the same point of the soap bubble, because the wavelength of the red light is relatively long, the light reflected from the upper and lower surfaces does not stack up well, and they weaken each other and cannot form a strong red reflection.

However, when the soap bubble is thicker, the red light waves will overlap and the blue light waves will weaken each other, and the soap bubble will look red.

The dark pattern corresponds to different inclination angles, and this kind of interference is called equidistant interference. The equidistant interference generally uses an extended light source and is observed through a lens.

When the upper and lower surfaces of the film reflect light at the same time, the total reflected light is the sum of the two parts of the reflected light.

Due to the wave nature of light, reflected light from two interfaces may interfere constructively (increase in intensity) or interfere destructively (decrease in intensity), depending on their phase relationship.

The phase relationship depends on the different optical paths of the two reflected lights, which depend on film thickness, optical constants, and wavelength.

And the light is reflected from the sparse medium into the dense medium, and the phase of the light will turn 180 degrees (i must be +12), so when the optical path difference is 2nd=(i+12)λ, the two groups of reflected light interfere constructively; the opposite , when the optical path difference is 2nd=iλ, the two groups of reflected light have opposite phases, so the interference cancels.

(d is the film thickness, i is an integer, and 2 is because the lower surface reflects the light through the film twice)

From this, it can be seen that the reflectivity of the thin film changes periodically with 1 wavelength (the inverse of the wavelength). Thicker films have more oscillations in a given wavelength range, while thinner films have fewer, often incomplete, oscillations in a given wavelength range.

The optical path difference formula of two coherent lights in thin film interference is Δ=(θt)±λ2, where n is the refractive index of the thin film.

t is the thickness of the film at the incident point; θt is the refraction angle in the film; ±λ2 is due to the fact that the two coherent beams of light are at two interfaces with different properties (one is the optically thin-optical dense interface, the other is the optically dense-optically thin interface. ) due to the additional optical path difference caused by reflections.

To make a Nobili ring experiment, you need an electrolytic solution containing acid and lead, a metal sheet that can be electrolyzed, a DC power supply, wires, an anode and a cathode.

Coincidentally, Zhou Wenwen has these things, or alternatives.

Under Zhou Wenwen's order, the hunters had to start working, the electrolytic solution containing acid and lead, the hunters chose lead acetate solution and silver lead hypoacid solution.

The former is often found on Earth, and the latter is a mixed solution that hunters use the secondary acid obtained from the acid mud monsters in this world as the main material, supplemented by silver water and lead water. In the electrolysis test comparison, The secondary acid can make the object react better, the disadvantage is that the object is difficult to maintain the prototype.

Therefore, hunters add silver water and lead water as supplements, so that after the object is taken out, a layer of silver reflective film can be applied.

For the electrolyzed metal sheet, the hunter chose a piece of nickel that was disassembled on the overclocking armor. After the wires, anodes and cathodes were also found from the overclocking armor, the remaining DC power supply trapped the hunter.

Direct current, DirectCurrent, referred to as DC, also known as "constant current", constant current is a type of direct current, which is direct current with the same magnitude and direction.

In 1747, Franklin in the United States proposed the law of conservation of electric charge based on experiments, and defined the terms of positive and negative electricity.

Constant current means that the magnitude (voltage level) and direction (positive and negative poles) do not change with time (relative range), such as dry batteries.

Pulsating DC means that the direction (positive and negative) does not change, but the magnitude changes with time.

For example, the typical pulsating direct current is obtained by rectifying the 50Hz alternating current through the diode, and the 50Hz pulsating direct current is obtained by half-wave rectification.

If it is full-wave or bridge rectification, the 100Hz pulsating DC is obtained, and they become smooth DC only after filtering (using inductors or capacitors). Of course, there are still pulsating components (called ripple coefficient), and the size depends on the filter. The filter effect of the circuit

Direct current is also a unidirectional flow or movement of electric charge, usually electrons, the current density varies with time, but generally the direction of movement is the same at all times ~www.wuxiamtl.com~ And as an adjective, DC can be used for reference voltage (its polarity never changes).

In a DC circuit, electrons are formed from the cathode, the negative pole, and the negative pole, and move toward the anode, the positive pole, and the positive pole.

Direct current is generally produced by electrochemical and photovoltaic cells and batteries, but in most countries the current flowing from equipment is alternating current, AC.

Fortunately, alternating current can be converted to direct current by passing through a power supply consisting of a converter, a rectifier (to stop the current from flowing in the opposite direction), and a filter (to remove the pulsation in the current flowing from the rectifier).

And virtually all electronic and computer hardware requires direct current to work.

Most solid state devices require voltages ranging from 1.5 to 13.5 volts.

The demand for current ranges from close to 0 in an electronic watch to over 100 amps required by a wireless communication energy amplifier.

Devices that use vacuum tubes, such as high-energy radio or television broadcast transmitters or cathode ray tube (CRT) displays, require about 150 volts to several thousand volts of direct current.

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