Vol 2 Chapter 246: Experimental research and microscope resolution

After a moment.
Richard stood on the street, surrounded by a large group of people lying on the ground and screaming at the red gang. They either broke their legs or cut their hands. In short, they lost their fighting ability.
The rest of the Red Skates looked at Richard with a horrified look, and felt like a monster. The muscular men who were separated from the distance looked at Li Cha with shock, feeling that Li Cha was also a monster, but a monster who helped them.
At this time, footsteps sounded in both directions on the street and the end of the street, and many muscular men rushed out, all holding heavy weapons. After rushing out, the newly arrived muscular man first looked at the bleeding companion and shouted: "Brothers, we are coming late, hold on!"
Then, he looked at the man who had been mostly downsized and armed, and shouted with red eyes: "The of the Hongsk gang dare to attack us and take their lives!"
When the words fell, the newly emerged muscular man shoved mercilessly. Li Cha saw a man rushing to the front. He was two meters tall and weighed two hundred and fifty pounds. Who else will it be?
Richard suddenly remembered that Bucky did say before that he had a large number of brothers...
The people of the Hongsk gang panicked and felt that the battle could not be fought, and shouted in their mouths: "We vote..."
"No surrender!" Bucky shouted, his voice completely overshadowed the people of the Redsk gang, and then slammed into the rest of the Redsk gang.
The people of the Redsk: "Nima...ah!"
...
"Boom!"
"Ah!"
The sounds of battle and screams quickly subsided. Due to Richard’s participation, the muscular man had caused huge damage to the Redsk Gang. Now, a new army led by Bucky joined and quickly defeated all the remaining Redsk Gang. People, won.
...
moment.
Muscular men clean the battlefield, the main content is punching and kicking people on the ground, and venting emotions. Then they were one by one, ready to wait for the leader of the Redsk Gang to pay for the money.
In the corner, Richard is talking to Bucky.
"So, this is your brothers?" Richard asked.
"Well." Bucky nodded. "It's a real brother. I still want to thank you for this matter, or our people will suffer."
Richard shrugged: "It just happened."
"But in any case, I owe you two relationships. If you have any trouble, you can find me. I will help you deal with it." Bucky said, "Even if I can't do it myself, the Brotherhood of Steel It's also OK."
"Is the Brotherhood of Steel...well, I will find you something." Richard said, and then asked, "However, I am more curious, why do you want to join this Brotherhood of Steel?"
"Because there is no money." Bucky spread his hands and said frankly, "In the college, a new wizard apprentice like me, if I want to really learn something, I always have to find a way to get money. Join The gang is obviously the best choice for me.
Besides, I still want to redeem myself. I don’t want to be Ruth’s fiancé all my life. Does my king's father have to think about it, or find a way to do it himself, and this requires a lot of money. "
"Well, well, I understand." Richard nodded and said goodbye, "Since this, I will not disturb you in dealing with the gang. I will leave first, and I will see you again."
"Uh, there is a chance to see you again."
Richard turned and walked to the side, and Bucky watched Richard leave.
When Richard disappeared at the end of the street, a muscular man walked over to look at Bucky and asked quietly, "Brother Bucky, who was that person just now, do you know? Just now, I heard from the brothers that he seemed like Help us knock down half of the people in the Redsk Gang."
"That's a friend of mine." Bucky said.
"Friend?" The muscular man froze a little for a moment, then looked at Bucky, revealing the expression "it turns out so".
Bucky sensed it, glared, and slapped it on the muscular man's head with a slap. Because of the advantage of height, this slap looks completely unconventional. Bucky taught: "It is a true friend, you know! You, no, want, chaos, think!"
"Oh, understand!" The muscular man covered his head and whispered, "I understand! I understand!"
Bucky: "..." You know a ghost!
...
At night, the laboratory.
In the main laboratory in the backyard, Pandora was still asleep on the bed in the corner.
On the table in the middle, Richard is busy.
On the table, there is a delicate thing like a microscope, which Richard assembled using parts obtained from Yaris during the day.
Generally speaking, the earliest microscopes were made on the modern earth by the Dutch in the late 16th century. The more famous Hook microscope was more than half a century later. It was produced in the middle of the seventeenth century, specifically in 1665. It was used by Hook to observe cork slides and discovered the presence of cells for the first time.
The microscopes assembled by Richard now are much more advanced than Hook microscopes, and more similar to modern optical microscopes. It has replaceable eyepieces, adjustable objective lens, condenser, reflector, stage and so on.
This microscope has deliberately improved the lens performance through Richard, the ultimate magnification can reach more than 1000 times, and the resolution is in the order of a few millimeters, approaching the limit-it can't be higher.
This is not a problem of tool accuracy, but a limitation of the application technology of the optical microscope itself.
It is called an optical microscope because it uses light to observe. Therefore, the resolution limit is determined by the wavelength of visible light. When the size of the object is close to the wavelength of light, light diffraction will occur, and the amplification cannot be continued. Forcible amplification is also blurred.
And this limit formula is: σ=0.61λ/NA;
σ is the minimum resolution distance; λ is the wavelength of visible light of human eyes, the average person is between 400 ~ 760nm, the range of some people is slightly larger, the range of some people is slightly smaller, with certain individual differences;
NA stands for Numerical Aperture, UU reads www. uukanshu.com is the numerical aperture of the objective lens-the magnification of the microscope is only related to the objective lens, not to the eyepiece.
It is a dimensionless number in the optical system, used to measure the angular range of the system can collect light, affected by the refractive index. When a substance with a high refractive index is used as the medium, such as immersing the objective lens in cedar oil, the NA value can be greater than 1, then the resolution σ of the microscope can reach 0.61400nm/1.2≈200nm=0.20mm.
In air, the NA value decreases and the resolution is greater than 0.20mm.
Of course, in most cases, it is not necessary to pursue such extreme resolution, it is enough to use in the air.
At this time, Li Cha held a drift bottle with a magic pattern on its inner wall, extended a long-handled spoon into it, removed some of the cultivated fungi, treated it, put it in a microscope, and observed it in the air.
Turn the of the microscope to adjust the focus. Richard looked at it with a single eye and muttered: "Sure enough, there has been a change, is it a phenomenon of the addition of additives."
After seeing it for a while, Richard raised his head, thoughtfully.