Dream Sword Country, the land of dreams, has the world-famous Gold Coast.

Especially at sunrise, the red light of the clouds rises from the bottom of the sea, as if you have seen life born in the Milky Way.

Nature is so great, the universe is so great......

Wei Gong couldn't help but feel relaxed for a while.

What's more, beside him, sat a living princess, Her Royal Highness Kenrin Sakura, who wore a small white cloak this morning and stepped barefoot on the sand.

Fair-skinned slender thighs looming.

The salty sea breeze blew, raising her long hair and skirt, and her long cloak curled high behind her like a ribbon, like a fairy.

I don't know why, when Emiya saw Jian Rin Sakura, he always felt that his heartbeat was a little faster.

The sun stained her perfect face red.

Jian Rin Sakura looked at the calm sea in the distance, and said thoughtfully, "Our Dream Sword Country, the land area is the smallest among the thirteen countries, and the military strength is also the weakest, and it has been invaded by pirates for many years, and it can't accumulate much wealth, but when it is quiet and peaceful, no place, no country can compare here......"

Wei Gong's heart moved, and he nodded in agreement, "Yes, Your Highness." ”

"Our Dream Sword Country, although it is a little smaller, but ......" Sword Rin Sakura turned around and looked straight into the eyes of the Emiya, "You have my promise, I will definitely provide you with the best sword-forging environment and the highest courtesy, so that you will not regret following me here, it will be better than the Chong Sword Country, no, better than any country." ”

"Your Highness......" Wei Gong was a little flattered.

"So, please help me and let us build a rich and powerful nation of the sea!" Kenrin Sakura reached out to hold his, and leaned a little closer to him, so that Emiya could almost smell her scent.

"Good...... All right. ”

Wei Gong blushed and nodded, could this be the legendary woman chasing the man?

At this moment, Cui Xiaoxiao, who didn't know when she appeared, stuffed a piece of paper into his hand, and then walked away silently.

Wei Gong unfolded it and looked at it, and he was half dead with anger-

"Do you know the three major illusions of life? Yes, she doesn't like you, you might as well think about our plans first. ”

Emiya flipped the piece of paper over and found a diagram of the structure of a telescope drawn on the back.

The principle of optical telescopes is relatively simple, that is, the use of convex lenses and concave lenses and a sufficient length of the lens barrel to control the capture and amplification of light, and it is also the most commonly used astronomical measuring instrument, although there is no later infrared or electromagnetic astronomical telescope detection range and capture information accurate, but for the current Cui Xiaoxiao, this is enough to determine some basic galaxies.

Telescopes don't have the idea of seeing far, but only how clearly they can see, because as long as there is light in the human eye, people can see it, even if the light comes from hundreds of thousands of light years away.

The larger the aperture of a good astronomical telescope, the more light it will receive, and the sharper the image will be.

There are generally two mirror tubes on astronomical telescopes, the larger one is the primary mirror, which is used to observe the target; The small one is called a star finder, which is used to find a target, and is also called a scope. The eyepiece is a single individual, and it is an item that determines the magnification, and the ultimate magnification of a telescope with a 6 cm aperture is about 120 times, and the maximum magnification of 8 cm is about 160 times.

With Cui Xiaoxiao's drawings and detailed explanations, coupled with Wei Gong's casting ability, it took less than half a day to make a retractable telescope with a diameter of 80mm and a focal length of 900mm.

Fold-back type, the shortest length of the lens barrel, the longest focal length, three times that of the lens barrel, with a meniscus shaped lens as the correction lens, its two surfaces are two spheres with different curvatures, the difference is not much, but the curvature and thickness are large. All of its surfaces are spherical, making it ideal for astronomical observations due to its ability to combine the advantages of both refractive and reflective telescopes.

When she saw the astronomical telescope built by Wei Gong, Cui Xiaoxiao smiled happily, her eyes lit up, as if she had seen a treasure.

For a cosmic physicist, this tool is more precious than the most beautiful gemstone in the world.

"Yes, it's much better than I thought." She happily patted Emiya's lower back, which is where the third lumbar vertebra is located.

With her height, she can't shoot that high.

"Of course. Do you know, this mirror is made by me with the unique cold crystal of the fairy sword world, it is easier to shape than glass, and it is easy to purify, without impurities, and the focusing effect of light is more than a thousand times better than glass. ”

This kind of tiny surface work as fine as 0.001mm is estimated to be impossible for other swordsmiths besides him, and this process is already more powerful than many manufacturers in the 21st century.

"If every factory had workers like you, we would be much more productive."

"Is it artificial......" the corners of Emiya's mouth twitched, "no kidding." ”

However, after Cui Xiaoxiao's reminder, a novel idea was suddenly born in Wei Gong's brain-

Perhaps, in this world of fairy swords, as long as modern knowledge and magic are combined, and then the spark of knowledge is spread, and a factory is established, scientific and technological achievements beyond the 23rd century can really be achieved.

……

In the evening, the weather is relatively good, cloudless, and the stars are dense, which is suitable for observation.

Cui Xiaoxiao stood on a chair, adjusted the angle, and quietly observed the vast starry sky with an astronomical telescope.

The beautiful and vast galaxy, in which the bright stars are magnified one by one in her world, is so beautiful that it is a mess.

"There are no familiar constellations nearby, I'm not sure if it's the same cosmic ......"

Is that really the case?

Really, as Cui Xiaoxiao said, in fact, we have traveled to another universe, and there is no earth here?

"Well, I can make a record of some of the stars around me first, and then make calculations for later."

"What are you doing?"

The sudden sweet voice behind him startled the two of them.

……