Because it is a recorded program, now that the second episode of the three episodes of "The Criminal Officer of the Great Song Dynasty" has ended, Lukov took advantage of the advertising time to bring a Fresnel double prism that had been prepared long ago to detect the wavelength of light transmission of Japanese oil-paper umbrellas.

Since it was impossible to simulate the state of sunlight, Lukov's assistants also asked the crew to convert the data through the lights, so it took some time.

And taking advantage of this opportunity, Lukov also told everyone about popular science:

"There is some scientific truth to this method of fumigating the bones and then using an oil umbrella to examine the bone injury.

First of all, he used steam to add water to the bones, and then let the light pass through the oil-paper umbrella, which can actually filter a part of the wavelength of light, and only let a specific wavelength of light in, and find some small and difficult to find scars under such conditions, which is the same as the current use of ultraviolet rays to find small scars, which is the same use of optical principles as the current use of ultraviolet rays to find small scars......

When everyone heard that the oil-paper umbrella was using the principle of ultraviolet light, they immediately looked at each other.

In other words, Song Ci used this method to make a simple ultraviolet instrument?

How is this possible?

Lukov glanced at Su Huai at this time and said:

"However, all this is only theoretical, and whether all this can be realized depends on whether this oil-paper umbrella can really reveal the light of the micron wavelength with a wavelength of 0.04-0.39......"

Lukov said, taking a deep breath and saying:

"Ultraviolet light was invented 90 years ago by Europa scientist Finsen, who looked at cats and then studied the spectrum with silver chloride and found that the purple end of the spectrum pronounced silver chloride more strongly than the red one......

And humans make artificial ultraviolet light sources for biological applications, through mercury lamps and electric arcs.

And these two things came into being after the Industrial Revolution......"

When everyone heard this, they finally began to understand what Lukov meant, and the Russian professor did not change his position, but used an extremely clever method to question the authenticity of the "Records of Clearing Grievances".

Lukov explained so much, which means that the case of "Records of Clearing Grievances" can be explained in principle, but in practice, it cannot be done by the ancients.

It's more like modern people through modern technology, pushing back the past.

At this time, the superintendent of Edogawa finally reacted, she had just ignored a detail, and when she heard Lukov say, she reacted:

"The oil paper umbrella is the traditional craft of the book, which was invented by the craftsmen of the book, also called the Kyoto umbrella, but the red paper umbrella is never used, all of them are white, and exquisite patterns are drawn on it......

I can say with certainty that an oil-paper umbrella made by applying sesame oil has absolutely no function of dialyzing ultraviolet rays. ”

Kyoto is famous for its umbrellas, and it is impossible for a world-renowned umbrella to be dialysed by various umbrella vendors, and it is impossible to dissolve ultraviolet rays.

When everyone heard so many details, they felt more and more that the steamed bone examination in this "Collection of Grievances" was completely like what modern people came up with, and it would never have appeared in ancient times.

Su Huai deliberately used modern methods to make this "oil paper umbrella".

He just takes modern science for granted, and does not conform to some common sense and details at all.

The red oil paper dyeing does not mean that ultraviolet rays can be transmitted, but there is a suspicion of "there is no silver three hundred taels here".

Now, once it is inspected, it can be detected that this prop "oil paper umbrella" is impossible to use sunlight to penetrate this ultraviolet ray.

After such an analysis by Lukov, the detective fans who had been feeling numb in their scalps finally breathed a sigh of relief, and it was indeed forged by Su Huai......

However, he can disguise the case through this knowledge, and in terms of detective reasoning skills, even Doyle and Edogawa combined can't compare.

But when people were thinking about this, they heard Russian scientists say: "After this oil-paper umbrella is transparent, the wavelength of sunlight should be 570um......."

This data made Edogawa smile as well, and sure enough, as she said, this oil-paper umbrella has no effect on dialysis ultraviolet rays at all.

"Mr. Su, what is your explanation for this matter?" the hostess Jenny deliberately asked Su Huaidao.

"There's no explanation, I just want to say one thing. Su Huai said calmly: "Huaxia's oil-paper umbrella is different from the one. ”

"What do you mean, Mr. Su, do you still want to say that this oil-paper umbrella was also invented by you in Huaxia first?" Jenny asked deliberately provocatively, and Edogawa's face was obviously a little bad.

"Of course, whether it is an umbrella, an oil-paper umbrella, or a paper, it was invented in China. Su Huai said in a calm tone:

"The earliest umbrella in China was called "禦" by people at that time. There is a relevant record in the "Historical Records" that in the Later Wei period, the umbrella was used for official ceremonies, and the common people called it 'Luo umbrella'. Depending on the size of the rank, the size and color of the umbrella are also different. The emperor traveled with a yellow Luo umbrella to express "shelter the people", in fact, the main purpose is to shade the sun, block the wind, and avoid the rain, but with the invention of paper, the oil paper umbrella has become the main rain tool for the common people, but our process is special, although the Tang envoy learned the production method of the oil paper umbrella, but the material is not right. ”

Everyone listened and wondered, and saw a staff member hand Su Huai an oil bottle and a piece of white paper, this oil was carried by Su Huai, because he was afraid that if he accidentally found some Chinese wooden cultural relics, he could carry out some simple protection.

Su Huai poured oil on the white paper in front of everyone, only to see that the paper turned red.

"No, the sesame oil is yellow, and there's a dye in it. Superintendent Edogawa exclaimed.

Su Huai didn't explain, but said, "Professor Lukov, you can take it for testing." ”

The Russian staff, after getting the paper soaked in red tung oil, tested it with a Lingguang mirror on the spot, and after calculating it, said with a trembling voice full of surprise:

"After this oil-paper umbrella transmits light, the wavelength of sunlight should be 340um......"

As soon as he said this, the whole audience didn't understand, but Lukov opened his mouth slightly and asked again: "How much?"

“340um…… We simulated all the sunlight data conversions, and the sunlight passed through the umbrella, which is the standard ultraviolet light. The assistant was also full of incredulity.

Lukov stood on the spot, and the whole audience was amazed, originally they all wanted to use this scientific principle to debunk the diorama of "Clearing Grievances", but now the results have confirmed that this oil-paper umbrella in China really has this function!?