In the sound

Hanging in in www.thebeijingnews.com · 2006-12-11 10: 16: 06 · Source: Beijing News waving magic wand, the magician mouth mumbling, who is suspended in the air — magic scene in this scene now in the laboratory are scientists. But this time the object is small animals, some of them before entering the laboratory does not have the ability to fly. More experiments are responsible by means of a space materials synthesis research group of the project. They use the "magic wand" is ultrasound. United States Web site of the journal nature in this report. Acoustic levitation environment is space microgravity no container status of a simulation, the scientists want to experiment and observe the "weightless" on what impact life style. They fired at ultrasonic and reflective side, placed on the ants, fish, ladybug, live animals, they are automatically suspended in the air. Half an hour later, with the exception of fish due to water loss, obviously does not apply to animals almost no hurt. "But the acoustic levitation and space environment or differentiated," Northwestern Polytechnical University Faculty of Science Professor solution Wenjun explained that "microgravity is because the vacuum of space, and acoustic levitation is because sound radiation force coincided with gravity balance. " Besides ultrasonic cannot restore space vacuum, high radiation. Therefore, the real space environment on the biological effects have yet to visit. In addition to the use of acoustic, optical and magnetic levitation experiment is also commonly used the "props". Prior to this, Japan Taoshan College University researchers invented "laser tweezers", you can let the tiny objects in the sky to flip over. And magnetic levitation train has already become a reality, is integrated into the day-to-day applications. Superman's hometown in krypton star, where the Earth's gravitational acceleration is 1000 times, adapting to the high-gravity environment of Superman came to Earth, of course, there is the wildest places. In other words, if man can make a sufficiently large microgravity environment, each can feiyanzoubi. Suspension technology really let the Earth every ordinary people into "Superman"? Unfortunately, scientists at the start of live acoustic levitation experiment before it has been given a negative answer. In theory, only when the length of the suspension, the object is equal to or less than the ultrasonic wave length, suspension is possible, but in the ultrasonic wave lengths to 0.01cm 10cm, and between human height. Reporter Li Jian-drawing/ Yong Ding Hua related news: riding the wave of wings