...This Russian website has this book on Theory of Photon AccelerationJ T Mendoncahttp://bit.ly/1M9gPyyby one of the original discoverers of what is known as photon acceleration.This website version of the book is only shown here for research purposes, for researchers such as @Notsosureofit, conducting such research.People are warned that this book is copyrighted and published by The Institute of Physics, and if interested, you are advised to purchase the book from an authorized bookseller, for example here is Amazonhttp://amzn.to/1FxkrXdinstead of relying on the copy from the Russian website....
I'm sure most have seen this but it's great to visualize a pulse of photons traveling down a coke bottle. What I found interesting is when the pulse reaches the top of the bottle and the area that shrinks in dimension. The wave front traveling in the center remains at the same speed but look at the sidewall of the bottle shaped like the frustum the wave is still the same but the distance traveled on the surface of the sidewall is longer. Just found this an interesting visual.
Quote from: SeeShells on 06/05/2015 12:45 amholes vs notNice info. Is a keeper.My issue would be getting a smooth & accurate roll of the frustum side walls if using other than a solid sheet. Not saying it can't be done but maybe not KISS.
holes vs not
This is for those of you who believe the refractive index of the vacuum is simply a "scalar field". It is not, it is a tensor field and behaves like an anisotropic crystal.https://www.researchgate.net/publication/1968721_Effective_refractive_index_tensor_for_weak_field_gravityEffective refractive index tensor for weak-field gravityPetarpa Boonserm †, Celine Cattoen ‡, Tristan Faber §, Matt Visser ∥, and Silke Weinfurtner ¶School of Mathematics, Statistics, and Computer Science, Victoria University of Wellington,P.O.Box 600, Wellington, New ZealandAbstract.Gravitational lensing in a weak but otherwise arbitrary gravitational field can be described in terms of a 3 × 3 tensor, the “effective refractive index”. If the sources generating the gravitational field all have small internal fluxes, stresses, and pressures, then this tensor is automatically isotropic and the “effective refractive index” is simply a scalar that can be determined in terms of a classic result involving the Newtonian gravitational potential. In contrast if anisotropic stresses are ever important then the gravitational field acts similarly to an anisotropic crystal. We derive simple formulae for the refractive index tensor, and indicate some situations in which this will be important.gr-qc/0411034; 8 November 2004;Revised 10 March 2005; LATEX-ed 7 February 2008Enjoy!
Quote from: rfmwguy on 06/05/2015 12:40 amQuote from: TheTraveller on 06/05/2015 12:31 amDriven mainly by the $4k cost of a 100W 3.85GHz Rf amp, versus $2k for a 100W 2.45GHz Rf amp and the help Roger Shawyer has provided in getting my EMDrive Calculator operational, I have decided to adopt the EW/Mulletron/Iulian copper frustum design but with a slightly altered length to get TE013 resonance at 2.45GHz.Will shortly provide data on the TE012 & TE013 resonance frequencies of the EW frustum (calculated as per Shawyer) plus what needs to be changed to achieve resonance at Shawyer's suggested TE013.As EWs has a variable narrow band Rf generator, would be interesting to see what they get exciting their frustum in TE013 mode at the frequency Shawyer claims will generate resonance. They may need to modify their antenna design and feedin point on the side wall.Broken record: Careful of the 4KV bias voltage Not using a magnetron. Instead using a variable frequently narrow band Rf gen with a 100W Rf amp. Similar setup to EW.
Quote from: TheTraveller on 06/05/2015 12:31 amDriven mainly by the $4k cost of a 100W 3.85GHz Rf amp, versus $2k for a 100W 2.45GHz Rf amp and the help Roger Shawyer has provided in getting my EMDrive Calculator operational, I have decided to adopt the EW/Mulletron/Iulian copper frustum design but with a slightly altered length to get TE013 resonance at 2.45GHz.Will shortly provide data on the TE012 & TE013 resonance frequencies of the EW frustum (calculated as per Shawyer) plus what needs to be changed to achieve resonance at Shawyer's suggested TE013.As EWs has a variable narrow band Rf generator, would be interesting to see what they get exciting their frustum in TE013 mode at the frequency Shawyer claims will generate resonance. They may need to modify their antenna design and feedin point on the side wall.Broken record: Careful of the 4KV bias voltage
Driven mainly by the $4k cost of a 100W 3.85GHz Rf amp, versus $2k for a 100W 2.45GHz Rf amp and the help Roger Shawyer has provided in getting my EMDrive Calculator operational, I have decided to adopt the EW/Mulletron/Iulian copper frustum design but with a slightly altered length to get TE013 resonance at 2.45GHz.Will shortly provide data on the TE012 & TE013 resonance frequencies of the EW frustum (calculated as per Shawyer) plus what needs to be changed to achieve resonance at Shawyer's suggested TE013.As EWs has a variable narrow band Rf generator, would be interesting to see what they get exciting their frustum in TE013 mode at the frequency Shawyer claims will generate resonance. They may need to modify their antenna design and feedin point on the side wall.
Quote from: SeeShells on 06/05/2015 03:22 am[youtube]snSIRJ2brEk[/youtube]I'm sure most have seen this but it's great to visualize a pulse of photons traveling down a coke bottle. What I found interesting is when the pulse reaches the top of the bottle and the area that shrinks in dimension. The wave front traveling in the center remains at the same speed but look at the sidewall of the bottle shaped like the frustum the wave is still the same but the distance traveled on the surface of the sidewall is longer. Just found this an interesting visual.Where do those flashes of light behind the advancing wave come from? They seem to appear (popping into existence, even) behind the initial pulse every time the lengthwise volume of the bottle stops shrinking (5:17 to 5:21, 5:25 to 5:29). What's more, why do those flashes look like they're stationary?EDIT: Is the light wave compensating for the change in geometry by making a portion of the light orthogonal to the original direction of the collimated beam? Does the delay come from time of flight to the camera?
[youtube]snSIRJ2brEk[/youtube]I'm sure most have seen this but it's great to visualize a pulse of photons traveling down a coke bottle. What I found interesting is when the pulse reaches the top of the bottle and the area that shrinks in dimension. The wave front traveling in the center remains at the same speed but look at the sidewall of the bottle shaped like the frustum the wave is still the same but the distance traveled on the surface of the sidewall is longer. Just found this an interesting visual.
Quote from: SeeShells on 06/05/2015 03:22 amI'm sure most have seen this but it's great to visualize a pulse of photons traveling down a coke bottle. What I found interesting is when the pulse reaches the top of the bottle and the area that shrinks in dimension. The wave front traveling in the center remains at the same speed but look at the sidewall of the bottle shaped like the frustum the wave is still the same but the distance traveled on the surface of the sidewall is longer. Just found this an interesting visual.Where do those flashes of light behind the advancing wave come from? They seem to appear (popping into existence, even) behind the initial pulse every time the lengthwise volume of the bottle stops shrinking (5:17 to 5:21, 5:25 to 5:29). What's more, why do those flashes look like they're stationary?EDIT: Is the light wave compensating for the change in geometry by making a portion of the light orthogonal to the original direction of the collimated beam? Does the delay come from time of flight to the camera?
Quote from: RotoSequence on 06/05/2015 09:03 amQuote from: SeeShells on 06/05/2015 03:22 am[youtube]snSIRJ2brEk[/youtube]I'm sure most have seen this but it's great to visualize a pulse of photons traveling down a coke bottle. What I found interesting is when the pulse reaches the top of the bottle and the area that shrinks in dimension. The wave front traveling in the center remains at the same speed but look at the sidewall of the bottle shaped like the frustum the wave is still the same but the distance traveled on the surface of the sidewall is longer. Just found this an interesting visual.Where do those flashes of light behind the advancing wave come from? They seem to appear (popping into existence, even) behind the initial pulse every time the lengthwise volume of the bottle stops shrinking (5:17 to 5:21, 5:25 to 5:29). What's more, why do those flashes look like they're stationary?EDIT: Is the light wave compensating for the change in geometry by making a portion of the light orthogonal to the original direction of the collimated beam? Does the delay come from time of flight to the camera?Cherenkov radiation perhaps?
Quote from: TheTraveller on 06/05/2015 01:11 amQuote from: SeeShells on 06/05/2015 12:45 amholes vs notNice info. Is a keeper.My issue would be getting a smooth & accurate roll of the frustum side walls if using other than a solid sheet. Not saying it can't be done but maybe not KISS.Who said I'm going to do this one in a smooth and slick way? You're right it is tough to take a perforated sheet and get it smooth. This one is my test bed, trying from the get go my different ideas, so it's not going to be a nice smooth curve. It's like when you and Rodal were tap dancing together today (and were doing a beautiful job BTW) a design factor becomes so close to zero why bother. This is going to be a little bent. I'm going to use a hexagonal funnel shape.
Quote from: PaulF on 06/05/2015 01:29 pmQuote from: RotoSequence on 06/05/2015 09:03 amQuote from: SeeShells on 06/05/2015 03:22 am[youtube]snSIRJ2brEk[/youtube]I'm sure most have seen this but it's great to visualize a pulse of photons traveling down a coke bottle. What I found interesting is when the pulse reaches the top of the bottle and the area that shrinks in dimension. The wave front traveling in the center remains at the same speed but look at the sidewall of the bottle shaped like the frustum the wave is still the same but the distance traveled on the surface of the sidewall is longer. Just found this an interesting visual.Where do those flashes of light behind the advancing wave come from? They seem to appear (popping into existence, even) behind the initial pulse every time the lengthwise volume of the bottle stops shrinking (5:17 to 5:21, 5:25 to 5:29). What's more, why do those flashes look like they're stationary?EDIT: Is the light wave compensating for the change in geometry by making a portion of the light orthogonal to the original direction of the collimated beam? Does the delay come from time of flight to the camera?Cherenkov radiation perhaps?If I understand the flashes meant... they are internal reflections. The incident light is traveling at an angle to the axis of the bottle, so the light gets refracted toward the normal by the near side of the bottle and then reflected off the far side of the bottle.Just look at the apple tomato example to see how the light propagates and hopefully it will become clearer.
I have an Italian coffee maker that looks like that
Quote from: Left Field on 06/05/2015 01:40 pmQuote from: PaulF on 06/05/2015 01:29 pmQuote from: RotoSequence on 06/05/2015 09:03 amQuote from: SeeShells on 06/05/2015 03:22 am[youtube]snSIRJ2brEk[/youtube]I'm sure most have seen this but it's great to visualize a pulse of photons traveling down a coke bottle. What I found interesting is when the pulse reaches the top of the bottle and the area that shrinks in dimension. The wave front traveling in the center remains at the same speed but look at the sidewall of the bottle shaped like the frustum the wave is still the same but the distance traveled on the surface of the sidewall is longer. Just found this an interesting visual.Where do those flashes of light behind the advancing wave come from? They seem to appear (popping into existence, even) behind the initial pulse every time the lengthwise volume of the bottle stops shrinking (5:17 to 5:21, 5:25 to 5:29). What's more, why do those flashes look like they're stationary?EDIT: Is the light wave compensating for the change in geometry by making a portion of the light orthogonal to the original direction of the collimated beam? Does the delay come from time of flight to the camera?Cherenkov radiation perhaps?If I understand the flashes meant... they are internal reflections. The incident light is traveling at an angle to the axis of the bottle, so the light gets refracted toward the normal by the near side of the bottle and then reflected off the far side of the bottle.Just look at the apple tomato example to see how the light propagates and hopefully it will become clearer.I think this is a reflection of the packet of photon energy propogating in the frustum-like bottle (towards the large end). A near field effect...comparing this to MW freqs, wonder if the near-field attenuation would be as great? I'm thinking no, as the skin-effect of copper would have far less attenuation at MW than light does in the clear plastic...
...As the packet enters just enters the neck and has passed the frustum area, the frustum area starts to increase dramatically in photonic activity even after the light pulse dissipates into the endcap and in one of the last frames you can see the end result.