Under the straight beam of the Green Laser, the light first passed through a glass wall. Soon, its beam subtly changed, as though something had obstructed it.
"There's another glass wall beneath this one?" Ding Yangze realized.
"There are four walls in total. The bottom one has the lowest hardness, and each layer above it is harder than the last." Zhao Yiyi's tone was calm. "Once the water is full, we'll gradually increase the pressure, one atmosphere at a time. If the glass walls can't hold, the sensors will sound an alarm and automatically release the pressure first. On top of that, we still have four walls as insurance. It won't blow us up!"
"Rationally, I know these glass walls are very strong, but emotionally, I'm still terrified." Ding Yangze forced out a strained smile. "Transparent things just make me feel uneasy."
"Relax. These glass walls have all been tested with explosives." Zhao Yiyi said, "Even the thinnest glass can withstand a kilogram of TNT without any trouble. It barely even develops surface cracks."
"One kilogram of TNT versus roughly six hundred atmospheres—which one is more powerful?" Ding Yangze couldn't help asking.
"When one kilogram of TNT explodes, the temperature shoots up to 2,800 degrees Celsius, and 7,800 liters of gas are produced instantly—more than twelve thousand times the explosive's volume. The resulting high-pressure gas cloud reaches tens of thousands of atmospheres." Zhao Yiyi explained, "Six hundred-something atmospheres? Piece of cake!"
Ding Yangze sucked in a cold breath. "Human technology really has made considerable progress over the years!"
"Who says it hasn't?" Zhao Yiyi watched the screen on her phone. "Just wait. It'll still take several minutes to fill the tank with water."
"I'm going to use the bathroom first. That scared me into needing to pee." Ding Yangze took