Chapter 639

It's just a pity that water can't make a significant difference between diamond and glass and refractive index.

Therefore, when Yunwei poured the broken drill and broken glass into the glass, there was still no obvious difference between the broken drill and broken glass. They both had almost the same reflection, and there was no difference with the naked eye.

Lisa Fang couldn't help saying, "Yunwei, don't waste everyone's time. There's only one minute left. Don't think you can complete the assessment."

Yunwei smiled and threw what she held in her hand into the clear water in the glass. The clear water slowly changed and became a little turbid and thick.

But as she sprinkled the material in her hand, a miracle appeared. Some of them emitted a very bright light, which was difficult to ignore, while some of them gradually disappeared, light and color, and integrated with water.

Yunwei breathed a sigh of relief and said, "it's cold. What is emitting light now is diamond, and what is consistent with the color of water is glass. If you want to pick out broken diamonds and broken glass, you just need to shine with a light and pick out the glowing ones. "

The cold heart of tomorrow night is a little shocked. Yunwei finally solves the problem!

Although she knows something about her intelligence, this time she is really seeing it.

He looked at Yunwei with a smile on her face, but there was not much pride.

Seeing that Leng has been looking at Yun Wei tomorrow night, Lisa Fang immediately said, "Leng Shao, don't believe Yun Wei. As you said, you can only use the things in this conference room to solve the problem. The things she was holding in her hand were obviously brought in by her from the outside! She cheated, Leng Shao! She must have used some chemicals brought in from the outside, some heavy liquid separation and other methods... "

Other students also didn't believe that Yunwei could solve the problem so easily, and looked at Yunwei unhappily.

Yunwei spread out her palm and said, "yes, I put some things in clear water. The refractive index of glass is completely different from that of diamond. Even the refractive indexes of glass, water and diamond are different. Therefore, when we put them together, they are the same as in the air. But if the refractive index of water becomes the same as that of glass, then glass can be integrated with water, and diamond is particularly attractive because its refractive index is different from them. "

"Your explanation can convince us, but the things you use can't convince us!" A boy said.

Several other candidates also shook their heads: "if the examination questions are not clear, they do not meet the examination rules, are they less cold?"

Tomorrow night Leng looks at Yunwei: "Yunwei, what do you say?"

Yunwei said with a smile, "what I use in my hand is something that can make the refractive index of water like glass. It's very simple. It's just salt. I found this when I was pouring water over there, and then grabbed it into the palm of my hand. It's also normal for salt to appear in the meeting room. I heard that many people use salt to wash cups with tea scale. When meeting in the conference room, many teachers like to drink tea. It seems normal that the school has prepared salt here. "

When Yunwei said this, everyone found that there was indeed a bag of salt in the place where the water was poured. It seemed that it had been put there long ago.