'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

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.

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

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.