'STUNNING ADMISSION' Pentagon admits it has been testing wreckage from UFO crashes

In alt.astronomy Andrew W wrote:
....
Bragalia said it was a "stunning admission" from the US government and the
documents reveal that some of the retrieved debris possesses "extraordinary
capabilities" including the potential to make things invisible or even slow
down the speed of light.

It's disheartening to hear this last bit.

Many materials "slow down the speed of light". E.g. glass. The "refractive
index" of various glases on which optical instruments depend is the ratio of
the speed of light in the material to the speed of light in air.

Slowing down the speed of light in a vaccum would be the trick.

He told The Sun: "The Pentagon has admitted to holding and testing anomalous
debris from UFOs.

On Wed, 17 Feb 2021 12:37:04 +0000 (UTC), R Kym Horsell wrote:
the speed of light

"And you can fly
High as a kite if you want to
Faster than light if you want to
Speeding through the universe
Thinking is the best way to travel

It's all a dream
Light passing by on the screen
And there's you and I on the beam
Speeding through the universe
Thinking is the best way to travel

We ride the waves
Distance is gone, will we find out?
How life began, will be find out?
Speeding through the universe
Thinking is the best way to travel

And you can fly
High as a kite if you want to
Faster than light if you want to
Speeding through the universe
Thinking is the best way to travel"

--The Best Way To Travel
(recorded 28 May 1968)
The Moody Blues
In Search of the Lost Chord
(c)1968 Deram Records

R Kym Horsell wrote on 17/2/21 11:37 pm:
In alt.astronomy Andrew W wrote:
...
Bragalia said it was a "stunning admission" from the US government and the
documents reveal that some of the retrieved debris possesses "extraordinary
capabilities" including the potential to make things invisible or even slow
down the speed of light.

It's disheartening to hear this last bit.

Many materials "slow down the speed of light". E.g. glass. The "refractive
index" of various glases on which optical instruments depend is the ratio of
the speed of light in the material to the speed of light in air.

Slowing down the speed of light in a vaccum would be the trick.

..... whereas slowing down the speed of light with a sheet of Lead is
quite easily done!!
--
Daniel

Daniel65 wrote:
R Kym Horsell wrote on 17/2/21 11:37 pm:
In alt.astronomy Andrew W wrote:
...
Bragalia said it was a "stunning admission" from the US government and the
documents reveal that some of the retrieved debris possesses "extraordinary
capabilities" including the potential to make things invisible or even slow
down the speed of light.

It's disheartening to hear this last bit.

Many materials "slow down the speed of light". E.g. glass. The "refractive
index" of various glases on which optical instruments depend is the ratio of
the speed of light in the material to the speed of light in air.

Slowing down the speed of light in a vaccum would be the trick.

.... whereas slowing down the speed of light with a sheet of Lead is
quite easily done!!

What is lead's refractive index?

R Kym Horsell wrote on 18/2/21 6:04 pm:
Daniel65 wrote:
R Kym Horsell wrote on 17/2/21 11:37 pm:
In alt.astronomy Andrew W wrote:
...
Bragalia said it was a "stunning admission" from the US government and the
documents reveal that some of the retrieved debris possesses "extraordinary
capabilities" including the potential to make things invisible or even slow
down the speed of light.

It's disheartening to hear this last bit.

Many materials "slow down the speed of light". E.g. glass. The "refractive
index" of various glases on which optical instruments depend is the ratio of
the speed of light in the material to the speed of light in air.

Slowing down the speed of light in a vaccum would be the trick.

.... whereas slowing down the speed of light with a sheet of Lead is
quite easily done!!

What is lead's refractive index?

Umm!! At a guess, I'd say "Infinity" or very, very, close!!
--
Daniel

Daniel65 wrote:
R Kym Horsell wrote on 18/2/21 6:04 pm:
Daniel65 wrote:
R Kym Horsell wrote on 17/2/21 11:37 pm:
In alt.astronomy Andrew W wrote:
...
Bragalia said it was a "stunning admission" from the US government and the
documents reveal that some of the retrieved debris possesses "extraordinary
capabilities" including the potential to make things invisible or even slow
down the speed of light.
It's disheartening to hear this last bit.
Many materials "slow down the speed of light". E.g. glass. The "refractive
index" of various glases on which optical instruments depend is the ratio of
the speed of light in the material to the speed of light in air.
Slowing down the speed of light in a vaccum would be the trick.
.... whereas slowing down the speed of light with a sheet of Lead is
quite easily done!!
What is lead's refractive index?
Umm!! At a guess, I'd say "Infinity" or very, very, close!!

They dope glass with lead to increase its refractive index (usually
written as symbol "n").
Making compound lenses for optical instruments from flint and lead glass
was a bit of a dark art when I was in school.
I presume these days it's all about selecting the right sensor
from an online catalog.
Scientists measured the refractive index of lead around 2.
I.e. the speed of light inside the metal is around 50% of the vaccum speed.

The "opacity" (usu written as symbol "k") of lead which I think you're
thinking of is a different but related issue.

--
Refractive index of METALS - lead
Refractive index n = 1.9076.
-- Bing

"R Kym Horsell" wrote in message ...

In alt.astronomy Andrew W wrote:
...
Bragalia said it was a "stunning admission" from the US government and
the
documents reveal that some of the retrieved debris possesses
"extraordinary
capabilities" including the potential to make things invisible or even
slow
down the speed of light.

It's disheartening to hear this last bit.

Many materials "slow down the speed of light". E.g. glass. The "refractive
index" of various glases on which optical instruments depend is the ratio
of
the speed of light in the material to the speed of light in air.

Slowing down the speed of light in a vaccum would be the trick.


I think that could possibly be done using electromagnetic fields.

R Kym Horsell wrote on 18/02/2021 11:33 pm:
Daniel65 wrote:
R Kym Horsell wrote on 18/2/21 6:04 pm:
Daniel65 wrote:
R Kym Horsell wrote on 17/2/21 11:37 pm:
In alt.astronomy Andrew W wrote:
...
Bragalia said it was a "stunning admission" from the US government and the
documents reveal that some of the retrieved debris possesses "extraordinary
capabilities" including the potential to make things invisible or even slow
down the speed of light.
It's disheartening to hear this last bit.
Many materials "slow down the speed of light". E.g. glass. The "refractive
index" of various glases on which optical instruments depend is the ratio of
the speed of light in the material to the speed of light in air.
Slowing down the speed of light in a vaccum would be the trick.
.... whereas slowing down the speed of light with a sheet of Lead is
quite easily done!!
What is lead's refractive index?
Umm!! At a guess, I'd say "Infinity" or very, very, close!!

They dope glass with lead to increase its refractive index (usually
written as symbol "n").
Making compound lenses for optical instruments from flint and lead glass
was a bit of a dark art when I was in school.
I presume these days it's all about selecting the right sensor
from an online catalog.
Scientists measured the refractive index of lead around 2.
I.e. the speed of light inside the metal is around 50% of the vaccum speed.

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.

Sometimes you bet right .... sometimes you bet wrong!! ;-P
--
Daniel

Daniel65 wrote:
R Kym Horsell wrote on 18/02/2021 11:33 pm:
Daniel65 wrote:
R Kym Horsell wrote on 18/2/21 6:04 pm:
Daniel65 wrote:
R Kym Horsell wrote on 17/2/21 11:37 pm:
In alt.astronomy Andrew W wrote:
...
Bragalia said it was a "stunning admission" from the US government and the
documents reveal that some of the retrieved debris possesses "extraordinary
capabilities" including the potential to make things invisible or even slow
down the speed of light.
It's disheartening to hear this last bit.
Many materials "slow down the speed of light". E.g. glass. The "refractive
index" of various glases on which optical instruments depend is the ratio of
the speed of light in the material to the speed of light in air.
Slowing down the speed of light in a vaccum would be the trick.
.... whereas slowing down the speed of light with a sheet of Lead is
quite easily done!!
What is lead's refractive index?
Umm!! At a guess, I'd say "Infinity" or very, very, close!!

They dope glass with lead to increase its refractive index (usually
written as symbol "n").
Making compound lenses for optical instruments from flint and lead glass
was a bit of a dark art when I was in school.
I presume these days it's all about selecting the right sensor
from an online catalog.
Scientists measured the refractive index of lead around 2.
I.e. the speed of light inside the metal is around 50% of the vaccum speed.

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.

Sometimes you bet right .... sometimes you bet wrong!! ;-P

Sure. What would I know about physics?

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!!

Sometimes you bet right .... sometimes you bet wrong!! ;-P

Sure. What would I know about physics?

I don't know .... What would *YOU* know about physics? ;-P
--
Daniel