Chapter 13: Double-Slit Interference (Part II)
Wu Ming didn't know how to answer the question of the elder in front of him who admired him, yes, I'm afraid that only a ghost would believe it, say no, how could he explain that he could draw the jade seal of the country, the hesitant Wu Ming rubbed his hands vigorously, he was a little uncomfortable, and he looked a little restrained, so he had to sprinkle his hesitant eyes on Tang Qi for help.
Tang Qi didn't know what to do at this moment, standing behind her father, she gritted her teeth, peeked at her father weakly, and then glanced at Wu Ming and shook her head, she knew that even if she made up a lie and said that she was copying the picture in that book, she would be poked by her knowledgeable father.
Seeing this, Wu Ming said in his heart: Whatever, tell the truth! He immediately nodded at Tang Fanghua and said, "Yes, although this sounds a little unbelievable......
Unexpectedly, Tang Fanghua smiled and cut off Wu Ming's words: "No! I believe! ”
"What? Can you believe it? Wu Ming stood up in shock, but he was relieved in his heart. Tang Qi was so shocked that he couldn't speak for a long time, Tang Fanghua glanced back at Tang Qi behind him, and gently patted Tang Qi's hand as if he was shocked.
Tang Qi frowned and was puzzled: "Didn't you say on the phone that this is pure nonsense?" ”
Tang Fanghua smiled and pulled Tang Qi to sit beside him: "I did say so before, but just before you came, I suddenly connected!" ”
Tang Qi and Wu Ming glanced at each other and then put their puzzled eyes on Tang Fanghua's broad forehead, waiting for Tang Fanghua to follow.
Tang Fanghua said with a smile: "The world is so big! You were at the academy gate just now? ”
Tang Qi was stunned: "You guessed this?" ”
Tang Fanghua smiled: "What's so difficult about this, I guessed it when I looked at the fragments of the old porcelain bowl you sent," and then said: "Then have you ever met a woman dressed like an ancient woman?" ”
Tang Qi and the others nodded, Tang Fanghua was solemn, and said, "Then have you watched the news?" ”
Tang Qi snorted and said, "I just saw it on the road," until this moment Tang Qi still had palpitations, and sighed: "Dad, what's going on with that?" Wu Ming and I saw it with our own eyes, how can a real person have nothing as soon as he takes a photo? ”
Tang Fanghua pondered for a moment and said, "Some things are indeed difficult to explain scientifically, but there is still a scientific basis for this matter?" You've all learned the 'double-slit interference experiment' in high school physics! ”
Tang Qi let out an 'ah', looked at his father and then at Wu Ming: "Have you two discussed it?" All talk about the double-slit interference experiment. ”
Of course, Wu Ming would not be surprised that Tang Fanghua would explain this strange phenomenon with double-slit interference, but Tang Fanghua couldn't help but look at Wu Ming's anxious eyes, and smiled at Wu Ming: "Young man, it seems that we are heroes and see the same thing!" ”
Wu Ming scratched his head a little embarrassed, Tang Qi glanced at Wu Ming affectionately, he was overjoyed, but his mouth was unforgiving: "Look at you like that!" ”
Tang Fanghua's eyes flashed, and he said in a deep voice: "Wu Ming, have you ever thought that if you look at the double-slit experiment from the perspective of quantum mechanics, then all this seems to have a relatively reasonable explanation. ”
Wu Ming seemed to be recalling the strange double-slit interference experiment, and thinking about it, he suddenly felt a little scared.
Because, in the double-slit experiment, normally, photons from the same light source are emitted at the same time, and the photons pass through the two slits, which will produce a series of alternating light and dark interference fringes on the white paper placed behind the two slits. However, at this moment, if you put a slit detector that can detect the movement trajectory of photons on the back of this blank paper, turn on the slit detector, the familiar interference pattern will immediately disappear and change to another pattern, turn off the slit detector, and the interference pattern will appear strangely again.
That is to say, if you look at it, it will disappear and appear in another form in front of the observer, and if you don't look at it, it will reappear in its original form.
Thinking of this, Wu Ming nodded and looked at Tang Fanghua, and said as if he didn't understand: "Uncle Tang, this experiment was originally to prove the wave-particle duality of light, and it did prove that light has two properties, but the problem is that with the addition of a slit detector, everything has changed. "So I'm wondering, is it true that once there is an observer, the observer will interact with the observed to change the state of the observed, so which of these two states is true and which is false?"
Tang Fanghua couldn't stop nodding his head when he heard Wu Ming's words, and a feeling suddenly appeared in his heart, as if he had known Wu Ming a long, long time ago.
Tang Fanghua didn't interrupt Wu Ming's words, and listened carefully to Wu Ming's continued thinking and statement: "I'm wondering if it's the same reason that chameleons change their colors because of the changes in their surroundings? But the question is, what is the true color of a real chameleon? If we close our eyes and don't look at everything around us, what should this unobserved world look like? ”
The corners of Tang Fanghua's mouth smiled with satisfaction, and his hands were clapping: "Well said!" If you're a science student studying quantum mechanics, I probably don't think you're making a big deal about it, but you're an art student, and it's really remarkable that you can think so deeply about the problem that plagues the scientific community! Very good, very good! ”
Tang Qi saw that his father praised Wu Ming so much, not to mention how happy he was, but Tang Qi didn't agree with Wu Ming's opinion very much, so Tang Qi pouted: "Wu Ming, you mean that the girl in the skirt found that people were taking pictures of her, so she deliberately appeared in another state on the photos or videos, and the result was that nothing could be seen in the photos, or people who could only see her clothes and not her."
Wu Ming nodded: "Exactly!" ”
Tang Qi snorted: "Then why is she alone?" I think she should be called a witch, a witch who can do magic! ”
Wu Ming quipped: "Why does it have to be a witch?" Fairies can also be magical! ”
Unexpectedly, Tang Qi, who heard this, suddenly became jealous, and regardless of his father's presence, he immediately said angrily: "Yes! She is so beautiful, and she can play tricks, of course she should be a fairy, how can she be an ugly witch? "No, you should call her fairy sister or fairy sister, so that she is as good as you, right!"
Wu Ming was stunned on the spot, looking at Tang Qi with black lines: "What are you doing here?" Isn't that just a title? As for being so angry? ”
Tang Qi turned his head and turned his back to Wu Ming and his father: "Hmph! I'm narrow-minded! Split hairs! Ignore me! ”