|
|
|
Thread Tools | Display Modes |
#11
|
|||
|
|||
'STUNNING ADMISSION' Pentagon admits it has been testing wreckage from UFO crashes
Daniel65 wrote:
R Kym Horsell wrote on 19/02/2021 6:21 pm: Daniel65 wrote: R Kym Horsell wrote on 18/02/2021 11:33 pm: Snip The "opacity" (usu written as symbol "k") of lead which I think you're thinking of is a different but related issue. Having done, and taught, a little bit of Radio propagation theory in a past incarnation (over twenty-five years ago!!), 'Refractive Index' was an indication of how far a radio wave (which light consists of) is bent towards/away from the normal as it passes from one medium to another. As light does not pass through Lead, I guessed it would have a high refractive index. That would be factually inaccurate. Light can pass through most substances if it is strong enough. So-called "transparent" objects have substances that interact very little with light photons. For an interaction to happen the photon normally must have a frequency/wavelength with the energy of an orbital electron in the substance. Very high energy photons can interact with the nucleus. X-rays and gamma rays are a form of light. They are known to regularly pass through lead. "X-rays and .... regularly pass through lead"?? Really?? I thought that was why Radiographers regularly wore lead aprons!! You seem to be a bit of a black and white thinker. Things are either "stopped" or "go through" a substance. Unfortunately it's not something that is eaily cured by mr google. -- The Refractive Index - n - of a medium is a measure for how much the velocity of light is reduced inside the medium. The velocity of light in a medium can be expressed as v = c / n (1) where v = velocity of light in the medium (m/s, ft/s) c = speed of light in air or vacuum - approximately 3 10^8 m/s (or 299792458 m/s) -- www.engineeringtoolbox.com |
#12
|
|||
|
|||
'STUNNING ADMISSION' Pentagon admits it has been testing wreckagefrom UFO crashes
On Fri, 19 Feb 2021 09:53:42 +1100, "Andrew W" wrote:
I think that could possibly be done using electromagnetic fields. Andre-Marie Ampere was born to Jean-Jacques & Jeanne-Antoinette Desutieres Sarcey-Ampere in their rented apartment at no. 44 Quai Saint-Antoine, Lyon 2e Arrondissement(4E49:56,45N45:52) on Friday 20 January 1775. His baptism record at the nearby Saint-Nizier church dated "Le vingt-deux janvier" did not indicate birth time (BR/bio). Guesstimates abound, mine is 8:20 PM LMT. |
#13
|
|||
|
|||
'STUNNING ADMISSION' Pentagon admits it has been testing wreckagefrom UFO crashes
R Kym Horsell wrote on 19/2/21 10:39 pm:
Daniel65 wrote: R Kym Horsell wrote on 19/02/2021 6:21 pm: Daniel65 wrote: R Kym Horsell wrote on 18/02/2021 11:33 pm: Snip The "opacity" (usu written as symbol "k") of lead which I think you're thinking of is a different but related issue. Having done, and taught, a little bit of Radio propagation theory in a past incarnation (over twenty-five years ago!!), 'Refractive Index' was an indication of how far a radio wave (which light consists of) is bent towards/away from the normal as it passes from one medium to another. As light does not pass through Lead, I guessed it would have a high refractive index. That would be factually inaccurate. Light can pass through most substances if it is strong enough. So-called "transparent" objects have substances that interact very little with light photons. For an interaction to happen the photon normally must have a frequency/wavelength with the energy of an orbital electron in the substance. Very high energy photons can interact with the nucleus. X-rays and gamma rays are a form of light. They are known to regularly pass through lead. "X-rays and .... regularly pass through lead"?? Really?? I thought that was why Radiographers regularly wore lead aprons!! You seem to be a bit of a black and white thinker. Things are either "stopped" or "go through" a substance. Yes ... though things cab get bent on their way through other things! Unfortunately it's not something that is eaily cured by mr google. "mr google"?? Who's that?? -- Daniel |
#14
|
|||
|
|||
'STUNNING ADMISSION' Pentagon admits it has been testing wreckagefrom UFO crashes
On Fri, 19 Feb 2021 09:53:42 +1100, "Andrew W" wrote:
I think that could possibly be done using electromagnetic fields. Edvards Liedskalnins was born to Andrejs & Mine Liedskalnins in Smohne (26E52:54,57N14:50)Namsadi, Stameriena parish, Livonia, Russian Empire on Wednesday 12 January 1887, and was baptized 22 February 1887 (A/BR). Predawn birth time unverified (sunrise 8:42), guesstimate ~8:00 AM LMT. |
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
admission only reads Sue's ease | Woody[_2_] | Amateur Astronomy | 0 | August 15th 07 06:02 AM |
Breaking Pentagon admission: They want terrorists to win | Anonymous AtWork | Amateur Astronomy | 0 | July 11th 06 03:43 PM |
Unknown Rocket Wreckage | C. Newport | History | 31 | December 19th 03 10:24 PM |
Trinidad: Wreckage found on beach may be part of space rocket | James Oberg | History | 2 | September 10th 03 02:46 AM |