tag:blogger.com,1999:blog-4637778157419388168.post396852130811762967..comments2024-03-21T09:01:08.175-07:00Comments on Physics with an edge: Response to John Baez: 1Mike McCullochhttp://www.blogger.com/profile/00985573443686082382noreply@blogger.comBlogger17125tag:blogger.com,1999:blog-4637778157419388168.post-34014442215397171142017-11-10T19:36:59.539-08:002017-11-10T19:36:59.539-08:00The following is clear and simple explanation
how... <br /> <b> <br />The following is clear and simple explanation <br />how the EmDrive works : <br /><br /><a href="https://quantumantigravity.wordpress.com/emdrive/" rel="nofollow"><br />https://quantumantigravity.wordpress.com/emdrive/</a><br /> <br /> <br /> <br /></b> <br />Ziggyhttps://www.blogger.com/profile/12215297051145082904noreply@blogger.comtag:blogger.com,1999:blog-4637778157419388168.post-72590982772949646102016-06-26T14:48:20.261-07:002016-06-26T14:48:20.261-07:00Nice rebuttal of Mr. Baez's comments Mike! I h...Nice rebuttal of Mr. Baez's comments Mike! I haven't had any correspondence with him in ages, but he was alway set in his dogma, quick to dismiss new ideas and does not try to understand them.WarpTechhttps://www.blogger.com/profile/05120553185472347899noreply@blogger.comtag:blogger.com,1999:blog-4637778157419388168.post-85382659601929099882016-06-25T12:52:59.316-07:002016-06-25T12:52:59.316-07:00On the Emdrive: Magnetron has small torque residue...On the Emdrive: Magnetron has small torque residue due to the Faraday motor effect...mathewormanhttps://www.blogger.com/profile/14901331051074257238noreply@blogger.comtag:blogger.com,1999:blog-4637778157419388168.post-90766170916505012802016-05-16T12:38:27.066-07:002016-05-16T12:38:27.066-07:00Ulrik: I don't know of a correlation between P...Ulrik: I don't know of a correlation between P and Q. To keep it simple, MiHsC predicts a thrust of:<br /><br />F=PQL/c * ((1/ws)-(1/wb))<br /><br />P = power (W), Q = quality factor of cavity, L = cavity length (m), ws and wb are widths of the small and big ends (m). So thrust depends on P, Q, L, ws and wb..Mike McCullochhttps://www.blogger.com/profile/00985573443686082382noreply@blogger.comtag:blogger.com,1999:blog-4637778157419388168.post-76755483586369762662016-05-16T10:58:18.065-07:002016-05-16T10:58:18.065-07:00Assuming that Q is linear proportional to the magn...Assuming that Q is linear proportional to the magnetron input power.<br />Is it?<br />Would a 7,500 fold power increase result an equivalent increase in net force?<br /><br />Judging by the data you have provided. Se link below:<br />http://physicsfromtheedge.blogspot.dk/2015/02/mihsc-vs-emdrive-data-3d.html<br />Applying a 7,5 MW magnetron should yield in the range of 67N to 2,35kN?Anonymoushttps://www.blogger.com/profile/16699525082837043753noreply@blogger.comtag:blogger.com,1999:blog-4637778157419388168.post-6482180514151032722016-05-16T10:36:15.541-07:002016-05-16T10:36:15.541-07:00This comment has been removed by the author.Anonymoushttps://www.blogger.com/profile/16699525082837043753noreply@blogger.comtag:blogger.com,1999:blog-4637778157419388168.post-49004410980659160342016-05-15T03:42:07.120-07:002016-05-15T03:42:07.120-07:00Mike McCulloch said...
> Good luck with it! Do...Mike McCulloch said...<br /><br />> Good luck with it! Do let me know how it goes. <br /><br />I've just finished the relevant writing project, whose ~22,000 words can be read at http://www.datapacrat.com/weirdtopia/index.html . I hope to return to it some day, to explore some of the further ramifications, but for now, it's essentially complete as-is.DataPacRathttps://www.blogger.com/profile/13779916498758404648noreply@blogger.comtag:blogger.com,1999:blog-4637778157419388168.post-34086636175900628882016-05-14T09:50:59.999-07:002016-05-14T09:50:59.999-07:00I hope you'll forgive an intrusion from a non-...I hope you'll forgive an intrusion from a non-physicist, but I should like to make a suggestion.<br /><br />Get together with Shawyer, design and have built an emdrive micro-satellite, and persuade one of the Billionaire Space Bosses to give it a free ride up to Low Earth Orbit. Spot it outside and give it a push. With an add-on transmitter to say where it is you have a pretty good chance of proving it all via Kickstarter. Anonymoushttps://www.blogger.com/profile/17782550052060336872noreply@blogger.comtag:blogger.com,1999:blog-4637778157419388168.post-9685492163976010502016-05-12T10:18:17.312-07:002016-05-12T10:18:17.312-07:00I think very high centripetal/neighborhood acceler...I think very high centripetal/neighborhood acceleration creating close Rindler horizons definitely lights a path towards particle dynamics. How can the story of the Standard Model be told in this language? Those descriptive phenomena are empirically confirmed, so the two ideas currently coexist somehow in reality.Analytic Dhttps://www.blogger.com/profile/14307179997233629815noreply@blogger.comtag:blogger.com,1999:blog-4637778157419388168.post-6864812135009068012016-05-12T04:08:07.061-07:002016-05-12T04:08:07.061-07:00Well, virtual until there's an asymmetry cause...Well, virtual until there's an asymmetry caused by a horizon - then it's real.<br /><br />I'm intrigued by the fact that the proton's radius is the size of a Rindler horizon for quarks spinning around at light-speed. It's far too sketchy to be more than a hint of what's happening, but it seems like a pointer to the processes involved.qraalhttps://www.blogger.com/profile/13436948899560519608noreply@blogger.comtag:blogger.com,1999:blog-4637778157419388168.post-60495105091940967322016-05-12T02:44:27.127-07:002016-05-12T02:44:27.127-07:00qraal: It is a virtual version of the process by w...qraal: It is a virtual version of the process by which light sails work: radiation pressure. With the light sail the source of the radiation pushing it is apparent to us: the Sun. In the case of MiHsC the source of the Unruh radiation (only seen by the object, not us) is a horizon which also disallows some wavelengths. Yes, the wavelengths may be very long but they still possess tiny amounts of momentum and radiation pressure, and when these are damped on one side of the object by the horizon the asymmetry can cause a push, especially in deep space (at galactic edges) where accelerations are tiny anyway.Mike McCullochhttps://www.blogger.com/profile/00985573443686082382noreply@blogger.comtag:blogger.com,1999:blog-4637778157419388168.post-68232999396394229932016-05-11T13:17:55.150-07:002016-05-11T13:17:55.150-07:00Hi Mike. One question I have about MiHsC is just h...Hi Mike. One question I have about MiHsC is just how such uber-long wavelength Unruh radiation interacts with particles. How does that work, since they're so gigantic?qraalhttps://www.blogger.com/profile/13436948899560519608noreply@blogger.comtag:blogger.com,1999:blog-4637778157419388168.post-29863848165495773612016-05-11T01:10:38.059-07:002016-05-11T01:10:38.059-07:00You got it right, bar a few details, and you expla...You got it right, bar a few details, and you explain the logic of it well. I'd suggest on line 17 ('a common result') saying a little bit more about the direction of the force (less vacuum energy on the horizon-side, so a net force that way: inertia) I'd also suggest changing 'inflation' on line 24 to 'cosmic acceleration'. MiHsC predicts something like inflation, but I haven't shown whether it agrees exactly yet. Cosmic acceleration is the more important process anyway: being more directly observed. Good luck with it! Do let me know how it goes.Mike McCullochhttps://www.blogger.com/profile/00985573443686082382noreply@blogger.comtag:blogger.com,1999:blog-4637778157419388168.post-87862967948547238312016-05-10T14:35:45.815-07:002016-05-10T14:35:45.815-07:00Mike,
I'm trying some science-fiction writing...Mike,<br /><br />I'm trying some science-fiction writing, and am including MiHsC. I've put up the relevant snippet at https://docs.google.com/document/d/1C93V5isVK9OeEGzxRLeN_iIFrf426E9cV2iM1qOtU8s/edit . Is there any chance that you'd be willing to offer any advice on how badly I've mangled my explanation, and what I could do to improve it?<br /><br />Thank you for your time.DataPacRathttps://www.blogger.com/profile/13779916498758404648noreply@blogger.comtag:blogger.com,1999:blog-4637778157419388168.post-34895858085197697882016-05-10T11:36:37.964-07:002016-05-10T11:36:37.964-07:00DataPacRat: I've had a look at the discussions...DataPacRat: I've had a look at the discussions. The clearest criticism made was Jonathan Lee's though I don't agree with his 'arbitrary' comment: I had to approximate MiHsC to apply it to the emdrive, but it is not arbitrary in any way.<br /><br />He makes a good comment about non-local communication between a local object and the Hubble horizon. My answer to this is that the phase speed of a monochromatic Unruh wave is not limited by the speed of light since it carries no information. So a local Unruh wave may well be aware of distant horizons without paradox.Mike McCullochhttps://www.blogger.com/profile/00985573443686082382noreply@blogger.comtag:blogger.com,1999:blog-4637778157419388168.post-55818472280058558492016-05-10T10:29:22.704-07:002016-05-10T10:29:22.704-07:00Some further discussion on the EmDrive and MiHsC i...Some further discussion on the EmDrive and MiHsC is going on in the comments at http://slatestarcodex.com/2016/05/09/links-516-linko-de-mayo/ (buried in threads on politics and sociology); to find the relevant comments, one thread is started by "smocc", at 10:51 pm, the other by "Phil" at 1:08 am. I would be happy to read any responses you would like to write to the points raised, either in your blog or comments here, or in the comments there, or in the backup comments thread on Reddit at https://www.reddit.com/r/slatestarcodex/comments/4imk2b/links_516_linko_de_mayo/ .<br /><br />Thank you for your time.DataPacRathttps://www.blogger.com/profile/13779916498758404648noreply@blogger.comtag:blogger.com,1999:blog-4637778157419388168.post-52225652354892247032016-05-09T08:16:50.344-07:002016-05-09T08:16:50.344-07:00Just a thought. If the EMDRIVE changes the inertia...Just a thought. If the EMDRIVE changes the inertia of the light, can we not measure it using a laser and a radiation pressure measurement. Measure the result at the large end then switch to the short end and then back rapidly many times to compensate for the variability of the laser. Try some cavities of different shapes (e.g. start with a cylinder to ensure results are same at both ends). The measurement should not be based on inertia as it would compensate, but torsion or elasticity or EM force something (need to show theoretically that the sensor is constant when its inertia changes). This should be feasible and would be definite proof. Are you intending to do something like this?<br />Nick WalkerAnonymoushttps://www.blogger.com/profile/16229737897433487013noreply@blogger.com