Still Waters Posted February 13, 2021 #1 Share Posted February 13, 2021 IN THE BASEMENT of a University of Pennsylvania engineering building, Mohsen Azadi and his labmates huddled around a set of blinding LEDs set beneath an acrylic vacuum chamber. They stared at the lights, their cameras, and what they hoped would soon be some action from the two tiny plastic plates sitting inside the enclosure. “We didn't know what we were expecting to see,” says Azadi, a mechanical engineering PhD candidate. “But we hoped to see something.” Let’s put it this way: They wanted to see if those plates would levitate, lofted solely by the power of light. Light-induced flow, or photophoresis, isn't a breakthrough on its own. Researchers have used this physical phenomenon to float invisible aerosols and sort particles in microfluidic devices. But they have never before moved an object big enough to grasp—much less lifted anything that can carry objects itself. https://www.wired.com/story/researchers-levitated-a-small-tray-using-nothing-but-light/ *long read* 4 1 Link to comment Share on other sites More sharing options...
+joc Posted February 13, 2021 #2 Share Posted February 13, 2021 6 hours ago, Still Waters said: IN THE BASEMENT of a University of Pennsylvania engineering building, Mohsen Azadi and his labmates huddled around a set of blinding LEDs set beneath an acrylic vacuum chamber. They stared at the lights, their cameras, and what they hoped would soon be some action from the two tiny plastic plates sitting inside the enclosure. “We didn't know what we were expecting to see,” says Azadi, a mechanical engineering PhD candidate. “But we hoped to see something.” Let’s put it this way: They wanted to see if those plates would levitate, lofted solely by the power of light. Light-induced flow, or photophoresis, isn't a breakthrough on its own. Researchers have used this physical phenomenon to float invisible aerosols and sort particles in microfluidic devices. But they have never before moved an object big enough to grasp—much less lifted anything that can carry objects itself. https://www.wired.com/story/researchers-levitated-a-small-tray-using-nothing-but-light/ *long read* Heat rises...that's one helluva breakthrough! # Heat Rises Link to comment Share on other sites More sharing options...
toast Posted February 13, 2021 #3 Share Posted February 13, 2021 17 minutes ago, joc said: Heat rises...that's one helluva breakthrough! # Heat Rises Here is a helluva breakthrough for you: heat does not rise, the carrier does, means, air. The experiment was performed in a vacuum chamber = no air = no carrier. 1 1 1 Link to comment Share on other sites More sharing options...
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