"Don't ask, wait until I make a gadget and show you how amazing the "magnifying glass" is." Mu Heng didn't want to spend words to explain, so he directly showed them the results.

"What's the presentation?" Su Su didn't feel that Mu Heng's support was too big, and his mind was all on the gadgets that Mu Heng said.

"Look at it." A mysterious smile flashed in Mu Heng's eyes, and then he asked Su Su for help: "Su Su, help me get an ice cube."

"Ice?" Su Su looked puzzled, not knowing what effect he could do with ice cubes at this time, but he still followed Mu Heng's instructions and asked, "What kind of ice cubes?"

Mu Heng didn't explain too much, but used his hand to draw the size of the ice cube to Su Su, and it was not as good as a glance to say a hundred words.

In fact, the magnifying glass made of glass or resin will have a better effect, but the current conditions are harsh, and you can only choose ice with poor light transmittance as a magnifying glass to gather sunlight and accelerate the condensation of the sun's true fire.

And the reason why Su Su was chosen to help make the magnifying glass was mainly because she was a wood attribute spirit root, which was easier and more convenient to do than the fire attribute spirit root that He forgot to worry about.

He Wuwu was looking forward to the miracle on the side, although he was dissatisfied with Mu Heng not letting him help, but he didn't care too much.

Su Su followed Mu Heng's description, converted the wood spiritual power in his body into water spiritual power, and released it from his fingers, and after a single operation, a transparent ice cube the size of a brick was formed.

Mu Heng took the ice cube handed over by Su Su and looked left and right, and saw that it was a little whitish in color, and he was not very satisfied. However, it was enough for a demonstration, and he began to shape the ice cubes with his claws.

The sharp claws with water spiritual power are like knives cutting tofu, and a slight touch of ice cubes can create a neat incision.

He Wangwu and Su Su next to him stared at the movements of Mu Heng's hands, but their expressions were completely different.

He Wangwei's face was full of curiosity, wanting to see what the magnifying glass in Mu Heng's mouth was.

But Su Su stared at Mu Heng in a daze, and after a while, she grabbed the ice cube and gestured with one eye, which made her connect Mu Heng with the old man in her heart again.

Looking at Mu Heng again, he had already dealt with ice cubes a few times and was very proficient, and soon a ice chip with a thick middle and thin edges had the prototype of a magnifying glass.

He went to the side and picked up a more wearable stone, and cut a flat surface under He Wang's red fairy sword as a polishing stone to help Mu Heng polish the ice cubes.

While grinding, he adjusted the subtle parts of the magnifying glass, and finally condensed a pool of clear water to wash the mirrors on both sides, and washed the mirrors on both sides to be crystal clear, and Mu Heng completed the production of the magnifying glass in anticipation.

"Whoa! This is the magnifying glass!" Mu Heng held a magnifying glass about ten centimeters in his hand, one and a half inches thick, and fully showed it to Su Su and He Wang.

"This is the magnifying glass?" He Forgetwei looked suspicious, took the magnifying glass from Mu Heng's hand, and put it in front of him to observe it carefully, but he didn't see anything special.

It is said that it is exquisite or not, and it is necessary to have aura without aura, let alone the Tao rhyme carried by the magic device, no matter how you look at it, it is just a mortal thing.

"That's it." Mu Heng replied.

"I can't see anything special, but it's a strange shape." He didn't find anything special when he saw it, so he handed it to Su Su.

"Just such a small thing, can you condense the true fire of the sun?" He forgot to worry about playing with the transparent ice cube in his hand, and he really couldn't understand Mu Heng's intentions.

"That's right, that's it!" Mu Heng gave a positive reply.

Su Su took the magnifying glass and just glanced at it twice, but didn't look at it much, but more eyes fell on Mu Heng.

Mu Heng saw that she didn't speak, but he frowned tightly and stared at him with strange eyes, and asked, "Susu, what are you looking at?"

"Nothing, just a resemblance to an old friend of mine." Su Su stretched his eyebrows and replied with a chuckle.

"Old friends? What old friends? Could it be that he is also a giant panda?" Mu Heng's heart sank when he heard this.

If you encounter another giant panda, or even a giant panda group, then you can't hide your fake identity.

"No, I just think you're a little similar to him." Susu then replied.

"Okay, let's not talk about that. Panda, show us what this thing is for, and how it connects to the true fire of the sun." He couldn't wait to see the effect of the magnifying glass, so he interrupted their chat.

"Oh, okay!" When Mu Heng heard He Wang's greeting, he didn't care about anything else.

Mu Heng picked a piece of flat land with good sunlight and picked up a few yellow leaves under the tree as props for the demonstration.

Throwing the withered yellow leaves on the ground, Mu Heng squatted on the ground with an ice cube magnifying glass. Su Su and He Wuwu, who were following behind, also bowed down and stared at the movements of Mu Heng's hands.

Without further ado, Mu Heng took a magnifying glass and placed it between the dead leaves and the sun, and the two surfaces were aimed at the sun and the dead leaves respectively. Then he kept adjusting the height of the magnifying glass, keeping his eyes on the light on the dead leaves.

"Huh? How can there be an aperture?" Why don't you forget to see that the height of the magnifying glass is constantly changing, and a circular circle of light appears on the ground from time to time, which is very strange.

Mu Heng didn't have the heart to explain to her at this time, but just worked harder to adjust the height of the magnifying glass, wanting to focus the focus of the magnifying glass surface on the dead leaves.

Seeing the white dots the size of mung beans on the dead leaves, the corners of Mu Heng's mouth twitched, and he finally found the focus.

"It's glaring!" He Forget stared at the light spots on the dead leaves that changed from big to small, and suddenly felt very dazzling, which made her want to close her eyes.

Su Su was also attracted by the scene in front of him, and only felt that this tiny point of light was very bright, but he couldn't see anything special about it.

"Poof!" A voice that was so light that he couldn't grasp it if he didn't listen carefully, Mu Heng knew that this demonstration was successful.

As the sound sounded, the dead leaves under the white light instantly turned black, and wisps of green smoke appeared, and then the smoke dissipated, and a pinch of small flames rose into the sky.

"Fire! It's on fire!" This step-by-step change was in the eyes of He Wangwu and Su Su, and the former stared at the flames that suddenly burst out in surprise.

Different from He Wang's surprise, Su Su stared at the flames with a complicated expression, thinking of more in his heart. Looking at Mu Heng again, he still looked focused, so Su Su couldn't help but look at him for a long time.

As the fire on the ground grew, Mu Heng put away the magnifying glass, got up, and asked them, "Do you understand?"

"yes, I see." He Wuwu also got up, patted his buttocks that were not stained with dust, and replied with a smile: "This magnifying glass can gather the sun's rays, and it is hot enough to ignite dead leaves." "It's amazing how this magnifying glass can gather the sun's rays!" Su Su also echoed.

"But how it came together, I still can't understand." He Wuxian then asked the doubts in her heart, and now she can only understand the superficial things, which can be said to know what it is, but she doesn't know why.

"It's going to have something to do with the refraction I said earlier."

"How?"

"The texture of air and ice is different, and the sun's rays will be refracted when they pass through the interface of these two media, that is, they will change their original direction, and the changed direction will have a certain angle with the original direction, which is called the refraction angle."

"And this magnifying glass I made, the surfaces on both sides have different angles to each other, so that after the sunlight passes through the magnifying glass, it will focus at a certain point, which is the very bright white spot you saw just now."

"In short, it is what the fairy said is that the light shining on the surface of one side of the magnifying glass can be concentrated at the focal point of the other side, so as to achieve the purpose of concentrating the energy of the sun."

Mu Heng was like a river, and gave a brief introduction to the working principle of the magnifying glass in one breath, regardless of whether they could understand it or not, anyway, he finished speaking.

"Understood?"

After speaking, Mu Heng glanced at Su Su and He Wangwu left and right, and saw that they were all looking dull-eyed, and he also understood that this was too professional for them.

"Susu, do you understand?

？」 Seeing the disappointed expression on Mu Heng's face, He Forget was a little embarrassed, and he didn't dare to look at Mu Heng's eyes, so he asked Su Su next to him.

Su Su was not as cowardly as He Wangwei, and generously admitted, "I didn't understand!"

"There's no doubt that this magnifying glass can gather the sun's rays, right?" Mu Heng didn't expect them to figure out the principle of this, as long as they knew a performance, they could help themselves complete the next step of condensing the true fire of the sun.

"Uh-huh!" He Wuwu responded excitedly, the phenomenon just now gave her great confidence in Mu Heng's condensation of the true fire of the sun, and it seemed that victory was already beckoning to her.

"Panda, what do we do next?" Su Su also followed Mu Heng to the second forbidden platform, and when he saw Mu Heng looking at the sun in the distant sky, he asked.

"We're going to make a huge magnifying glass that gathers enough sunlight to collect enough to condense the sun's true fire in a single day." Mu Heng said without looking back.

"How?" He was also eager to try, wanting to help Mu Heng complete this unprecedented cause.

"Let's divide the work first! Condense the true fire of the sun, which of you two will come?" Mu Heng turned around, gathered around them, and asked the most critical question, he only knew how to provide enough energy, but he didn't know how to condense the true fire of the sun, so he threw this problem out first to solve it.

He Wangwei and Su Su glanced at each other and took a step forward, and said to Mu Heng, "Let me come."

"You?" Mu Heng thought that Su Su should stand up, after all, he was a three-talent mirror, but he didn't expect to be preempted by He Wangwei.

Seeing Mu Heng's skeptical attitude, he felt a deep distrust, so he wanted to prove his strength in front of him, and said, "Although I am only in the Four Elephant Realm, I am the spiritual root of the fire attribute, and I have an abnormal sensitivity and talent for fire, so it is most suitable for me to condense the true fire of the sun."

Seeing that she was so positive and gave a positive promise, Mu Heng no longer doubted it, and said, "Then please leave it to you."