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Comprehensive tests show that the “impossible” EmDrive is actually impossible



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Mankind has come a long way in understanding the universe.We have a physical framework most In line with our observations, the new technology allows us to analyze the “big bang” and take photos of black holes. But the hypothetical EmDrive rocket engine threatens to subvert our understanding of physics…if it is feasible. After the latest round of testing, we can say with a high degree of certainty that there is no.

If you have memories from the 90s, you may remember your interest in cold fusion, which is a hypothetical chemical process that can generate energy from fusion at room temperature instead of millions of degrees (choose your favorite The ratio, the number is huge). EmDrive is basically the cold fusion technology of the 21st century. EmDrive was first proposed in 2001. It uses an asymmetric resonant cavity that can reflect electromagnetic energy. There is no exhaust, but supporters claim that EmDrive produces thrust.

The idea behind EmDrive is that the cone shape of the cavity will reflect radiation in some way, so that a large net force is exerted on the resonator at one end. Therefore, an object can use this “engine” for super-efficient propulsion. This would directly violate the conservation of momentum. It wasn’t until 2016, when NASA’s Eagelworks laboratory built and tested the prototype, that interest in EmDrive was dispersed.According to the team, they found a small but measurable net force, and that Aroused people’s interest.

People are skeptical of Eagelworks’ results, and other teams cannot replicate the results. A team from the Dresden University of Technology completed a comprehensive new test in an attempt to replicate the results of Eagelworks. They did not find anything-the Dresden EmDrive produces zero thrust, this is because electromagnetic radiation bounces inside the resonator.

EmDrive in Dresden is an exact copy of NASA Eagelworks’ settings.

The team also tried to explain Eagelworks’ results by changing the experimental design. Researchers in Dresden used better measurement techniques to prove that EmDrive does not generate thrust, but by adjusting the measurement scale and changing the suspension point of the resonator, they obtained the same smaller apparent thrust as NASA. This confirms that Eagelworks’ thrust is actually just a thermal effect. Researchers also speculate that Eagelworks carefully selected data by reporting random fluctuations in a way that does not represent the complete data set.

It really feels like EmDrive is about to come to an end. Unless someone can identify the huge physical elements we missed, the engine will not function as described. Proponents of EmDrive will have to pack it unless they want to end up like the cold fusion crank of the 90s. That’s just science in action, but it’s also a bit frustrating, because if it’s not a fantasy, EmDrive will change the world.

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