I think the idea of this is very different that what has been described by any of the posters so far. I’ll try and make the information accessible below, all links are to wikipedia. I am highly sceptical of this claim, so can anyone shoot is down in one swift blow?<br /><br /><br /><font color="yellow">In this case the force is generated by trapping microwave in specially shaped
wave guide.<br /><br />Microwaves and other forms of electromagnetic radiation may be thought of as very fast moving particles, they also have to be thought of as waves.<br /><br />Individual photons or Microwaves move at light speed, or their
phase velocity, energy is transferred by the wave aspect travelling at
group velocity. <br /><br />Group velocity is the result of waves of different wavelengths interacting with each other. According to Einstein, the phase velocity of electromagnetic waves is the speed of light in the appropriate medium whatever happens and in whatever moving frame of reference the observer happens to be; group velocity, however, varies. <br /><br />Group velocity can be any speed from stationary to light speed (with a few physicists suggesting the additional possibility of faster than light). This varies the level of momentum imparted when striking an impenetrable barrier, and thus the force exerted on it. <br /><br />Hence, it is possible to have a bottle full of electromagnetic waves exerting more force on one end than the other, whereas this is not possible for anything else that an engineer would normally be expected to encounter. <br /><br />Most academics have blanched at the very idea of getting involved in such a controversial idea. One, however, Dr Richard Paris (who seems to exist according to
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