Tang Hua picked up a piece of chalk and wrote the first line, the electronic transition formula, on the blackboard in the classroom.
"In 1917, Einstein published the paper "The Quantum Theory of Radiation". He proposed that the interaction between light and atoms includes stimulated absorption, stimulated emission and spontaneous emission. This is a theory of quantum mechanics. But in 1927, Dirac demonstrated the existence of stimulated radiation in experiments."
"So I have an idea," Tang Hua said, "Since stimulated radiation exists and it has such a characteristic, why can't a set of instruments be used to deliberately generate this kind of stimulated radiation light or electromagnetic waves?" ?”
"For a particle at a high energy level, when a photon with a frequency that is exactly the difference between the high and low energy levels is incident, it will cause the particle to transition from a high energy level to a low energy level with a certain probability, and at the same time radiate two photons with the frequency, phase, and Photons with the same polarization state and the same direction of propagation.” Teacher Zhao is naturally familiar with this Einstein’s classic theory, and he also picked up a piece of chalk to draw the atomic model of stimulated emission on the blackboard.
"That's right," Tang Hua said, "What I thought of was that when one photon hits such a particle, two photons come out, and the parameters such as the frequency and direction of the two photons are exactly the same."
Tang Hua drew another stick figure under Mr. Zhao's model, "Suppose there is a container filled with particles that have been blessed to a high energy level. At this time, I inject a photon, so as long as the frequency is right, it will just trigger the particles in the container. Stimulated radiation of particles, then a beam of light will be emitted from the other end of the container, and all photons in this beam have the same frequency, phase, polarization state and propagation direction."
"This is the purest light ever." Of course, Professor Qian was not willing to watch from the sidelines. He broke off half a piece of chalk from Teacher Zhao, and wrote the formula he thought of on the blackboard. "It's amazing, a beam of light is all on only one frequency..."
"It is also the light with the best directionality," Tang Hua added. "If it travels in an absolute vacuum, the size of the spot will not change when it hits the moon from the earth."
Mr. Zhao has already started writing the electronic energy levels of various atoms on the periodic table on the blackboard.
"Helium...neon...you can." Teacher Zhao entered the state, "The wavelength is more than 600 nanometers,...in fact, compounds can also..."
……
The sun was setting, and the three of them were still discussing endlessly in the classroom.
"Tang Hua, I made a simple calculation with the formula. It is not enough to make a container so that photons enter one end and exit the other end. The magnification of the beam is not enough, no matter how long the container is."
……
"That's a theoretical model. In fact, I think it should be a container where photons will be repeatedly reflected in it, and the photons will resonate inside..."
……
"Like a prism to reflect light inside?"
"This achieves a single frequency and coherent light, so what about the directional consistency of light?"
"I think this needs an engineering solution...Secretary Wu, go eat when you're hungry, don't spoil your stomach like Lao Zhou." Tang Hua waved his hand when he found Secretary Wu standing helplessly at the door of the classroom. .Just as Secretary Wu turned around, Tang Hua stopped him again, "When you are full, bring some buns up."
Half an hour later, a post-00s, a post-10s, and a post-20s, near the blackboard in the classroom, or leaning against the wall or table, each person began to eat a meat bun.
"It's a very interesting thing," Teacher Zhao said. "My hands are itchy. I really want to start doing it now."
"I assisted Teacher Zhao together." Professor Qian said.
"Mr. Zhao, Professor Qian," Tang Hua said, "I'm still busy developing more powerful computers, and I have a lot of other work to do. . . . Then I'll leave it to you. I want to use this kind of light in electronic engineering as soon as possible. superior."
……
Taipei.Gui Yongqing mourning hall.
Gui Yongqing, whose character is straightforward, was the commander-in-chief of the Republic of China Navy. He was born in 1900 and died in Aviation Control-1 B. No, he died on June 1950, 6.
"Loyalty, bravery, righteousness, sacrifice for benevolence, and a glorious death, will shine forever."
Two long elegiac couplets hang down from the largest wreath in the mourning hall, swaying in the wind.This is Chiang Kai-shek's handwriting.
Chiang Kai-shek, dressed in a straight military uniform and a black cloak, walked into Gui Yongqing's mourning hall, caressing the coffin and mourning greatly.All the soldiers of the national army present were also in tears.
"Comrade Gui Yongqing is a model of our party's revolutionary soldiers. He is loyal, self-motivated, upright, responsible, fights tough battles, does not shy away from hard work, and does not care about reputation. After the fall of the mainland, he wrote to me, saying that he has not yet obtained a The place of death. Frank now has not been able to achieve what he wished, so that his own life will be given a place of death in a vigorous and glorious battle, which is really unforgettable."
At the memorial service, Chiang Kai-shek continued with a strong Zhejiang Fenghua accent, choked up.
"Before Comrade Shunzhen died for his country, he still did not forget his mission. He told the people around him: Our navy will never surrender! Even if the warships and coastal defenses are finished, we will never surrender!"
"...It's so tragic," Bai Chongxi lowered his voice in the crowd, and said coldly to the school officer next to him, "I heard from Captain Chu Lianfang of the Danyang ship that Gui Yongqing was in pain. … ...bombs set off the bridge, his legs snapped and his femurs lodged in his abdomen. His last words were 'Ouch, ass hurts'."
"Adversity sees loyal ministers. When our navy is in danger of the party and the country, we must have people like this who are straightforward to stand up, regardless of life and death, and go to the national calamity together. Comrade Gui Yongqing, a glorious death will shine forever!"
Chiang Kai-shek finished his eulogy speech, and then the generals and officials of the national army present sang in unison:
"Great China, generation of virtuous and talented people! After the turmoil, they can all be revived! Chiang Kai-shek, today's savior; we will follow him forward, forward! Revival, revival!"
……
Chapter 43, The Blocked Straits
On June 6, the Penghu Islands.
After the Battle of Penghu, the 26nd Regiment of the 78th Amphibious Division of the Sanye 232th Army withdrew to Xiamen for rest, while the 28th Army and 31st Army stayed in Penghu.In the past five days, the main work of the 5th Army and the 28st Army was to serve as a guest engineer unit, building permanent fortifications on several major islands in Penghu.Of course, professional engineering troops have also been transported by landing ships one by one to the islands of Penghu in the past few days. Accompanied by the arrival of real engineers, there are also a large amount of reinforced concrete and a few construction machinery that are rarely seen in China.
The national army's navy was gutted in the Battle of Penghu, and it did not dare to press back after the battle.The national army air force dared to harass the sky over Penghu during the day, but under the deterrence of La-11, the national army bombers could not carry out high-intensity bombing on Penghu.However, for the sake of safety, the landing ship carrying engineering troops and supplies still had to dock at night and drive back to Xiamen before dawn.
During the daytime on June 6, the sky over the Penghu Islands was a little abnormal.In the past, there would always be a few P-27 fighter jets of the National Army flying over Penghu to attack and harass. When encountering the Wula-51 in the air, they would use machine guns to randomly shoot at our army's positions.But on this day, there were no national army planes to harass, and the sky was surprisingly quiet.
On the evening of the 27th, the observation post at the commanding heights of Big Maoyu used a walkie-talkie to report to the headquarters that the situation was discovered on the sea.Xiao Hong immediately ordered the troops to enter the battle state, and telegraphed the situation to Ye Hui, the commander of the 10th Corps in Xiamen and the former commander of Sanye.
"Seventeen warships of unknown nationality were found on the sea, sailing from south to north at a speed of about 17 knots, and are expected to cross the Taiwan Strait from the waters east of Penghu."
"Those who cross the Taiwan Strait are the task force of the Seventh Fleet of the United States. Please maintain a high level of vigilance and prepare for anti-air attack and artillery attack. Combatants enter the combat readiness fortification. If there is no sign of the enemy's active attack, our army should not take the initiative to open fire. .” Soon, Ye Hui sent a call back from Xiamen Qianzhi.
As the warships got closer and closer, the observation post carefully identified the ship type with a high-power observation lens at the commanding height of 78 meters above sea level. "The U.S. ships are marching in three columns, and the west column consists of two 'Baltimore' class heavy cruisers and four 'Keeling' class or 'Sumner' class destroyers, 2 kilometers away from our island;" the observation post tried hard to see The silhouettes I got corresponded with the US ships in the identification manual, "The middle column is an aircraft carrier, 4 transport ships or supply ships, and 6 warships. The ship class cannot be identified, and it is 2 kilometers away from our island; the east column is 2 warships. , the ship class cannot be identified, and it is 16 kilometers away from our island."
Now, even Xiao Hong, who is not at the commanding heights of the mountain, can still see the huge black shadow of the ship on the sea with his naked eyes.The length of the two largest ships is fully two and a half times that of the US-made destroyers of the Guomindang Party. The huge main turrets on the ships can be seen with the 7x binoculars in hand.
The caliber of the largest naval gun of the Kuomintang Navy is 127 mm, and it is still a single-mounted short gun that has been eliminated by the US Navy.Moreover, the Kuomintang warships equipped with three and four 127mm short guns were blown up by the Tu-2 before they saw Penghu. In the battles of Penghu and Kinmen, the headaches for our army were those on the US-made escort destroyers. 76mm naval gun.
The main gun of "Baltimore" has a caliber of 203 mm and is installed in three triple mounts. The 127mm gun is its secondary gun, six twin mounts.
The artillery of our army on Penghu Island now has a 105mm howitzer with the largest caliber and a 75mm field gun with the largest range.Shino collected some 140mm and 120mm coastal defense guns in the Northeast, which are more powerful against warships, but they can only be transported and installed after the reinforced concrete fortifications on Penghu Island are completed.
The 77th Task Force was sailing quietly and slowly in this way. The main turret on the ship was locked and pointed directly ahead and directly behind, without aiming at any target. The warship track was just outside the territorial waters line at a distance of 3 nautical miles.Such a huge fleet does not need to show its teeth and claws. It only needs to be seen by potential opponents, which is enough to constitute a deterrent.
However, the 77th Task Force still couldn't help showing more combat effectiveness.At 7:16 in the evening, when the night was dark, 3000 carrier-based aircraft that took off from the "Valley Forge" formed four diamond-shaped formations, flew to the Penghu Islands at an altitude of 10, and circled over the islands for [-] minutes.
For our army on the Penghu Islands, it is not just a matter of 16 planes coming.
"Hell, American planes are different from those of the National Army Air Force. They can also operate at night? Can their planes land on aircraft carriers at night?"
……
Beijing.late at night.
"This is the 77th Task Force of the Seventh Fleet heading north from the Philippines. The aircraft carrier in the formation is the 'Essex' class 'Valley Forge'." Tang Hua said, "The 77th Task Force is heading north. The main purpose is to reinforce the Korean peninsula, but at the same time, its open crossing of the Taiwan Strait is also a show of substantial support for Taiwan. It is expected that Task Force 77 will leave several warships behind after crossing the Taiwan Strait, mainly destroyers and light cruisers, they will use Keelung as a temporary port to start patrolling the Taiwan Strait. However, given the current defense crisis encountered by the national army, it is obviously not enough to use a few warships to defend Taiwan. It is expected that in the future, the US Navy will be on the seventh Under the fleet, a special task force will be set up, and more warships will be transferred from the mainland to enrich this task force, and Ryukyu, Keelung, or other ports in Taiwan will be used as rest ports for patrolling the Taiwan Strait."
Historically, the Seventh Fleet formed the 1950nd Task Force from July to September 7, which was dedicated to defending Taiwan, and it was not withdrawn until 9.When the 72nd Task Force was the largest, it included more than a dozen warships, two forward air bases, a Marine Corps brigade and an airborne battalion, with a total staff of more than 1979 people.
"After taking the Penghu Islands, our army will have to rest, adjust and prepare for at least two months before we can launch a landing campaign against Taiwan," the Premier said. We will have to recuperate until October before we can partially recover. Fortunately, we have advanced the launch of the campaign to liberate Penghu by half a month. The position of Taiwan's belly, Chiang Kai-shek will never have peace."
"Xiamen Qianzhi reported that during the day on the 27th, the Kuomintang Air Force did not send planes to harass Penghu," said Li Kenong. "The intelligence department is verifying from within the National Army and learning more about the situation."
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