Tractor beams make intuitive sense.
"In previous studies, the light-pulling force was too small to pull a macroscopical object,""With our new approach, the light pulling force has a much larger amplitude. In fact, it is more than three orders of magnitudes larger than the light pressure used to drive a solar sail, which uses the momentum of photons to exert a small pushing force."
"Our technique provides a non-contact and long-distance pulling approach, which may be useful for various scientific experiments,""The rarefied gas environment we used to demonstrate the technique is similar to what is found on. Therefore, it might have the potential for one day manipulating vehicles or aircraft on Mars."
Wang."In addition, the laser pulling is repeatable, and the force can be tuned by changing the laser power."in recent years with mixed results. NASA was interested in pursuing the idea of using tractor beams to gather samples with the MSL Curiosity surface rover. One of Curiosity's instruments is the ChemCam.
The researchers know this, of course, but point out that it's still an effective demonstration of feasibility.
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