Posted on 04/12/2021 4:23:18 PM PDT by BenLurkin
Why is sugar not transparent? Because light that penetrates a piece of sugar is scattered, altered and deflected in a highly complicated way. However, as a research team from TU Wien (Vienna) and Utrecht University (Netherlands) has now been able to show, there is a class of very special light waves for which this does not apply: for any specific disordered medium—such as the sugar cube you may just have put in your coffee—tailor-made light beams can be constructed that are practically not changed by this medium, but only attenuated. The light beam penetrates the medium, and a light pattern arrives on the other side that has the same shape as if the medium were not there at all.
This idea of "scattering-invariant modes of light" can also be used to specifically examine the interior of objects.
The waves on a turbulent water surface can take on an infinite number of different shapes—and in a similar way, light waves can also be made in countless different forms.
As special and rare as these scattering-invariant light modes may be, with the theoretically unlimited number of possible light waves, one can still find many of them. And if you combine several of these scattering-invariant light modes in the right way, you get a scattering-invariant waveform again.
This method of finding light patterns that penetrate an object largely undisturbed could also be used for imaging procedures.... This could be interesting for biological experiments, for example, where you want to introduce light at very specific points in order to look deep inside cells.
(Excerpt) Read more at phys.org ...
Uberman: I am.. Uberman! I have superhuman powers, and I fight for untruth, injustice, and the Nazi way! And I have X-ray vision!
Lois Laneoff: X-ray vision? Can you see through my clothes?
Uberman: Ya! And through his, too. [ points at Jimmy Olstein ] He’s a Jew!
Jimmy Olstein: No! No, it’s not true! My parents were just very advanced in hygeine, that’s all!
Boy’s Life was the best!
But can the light go through Nutrasweet?
If memory serves, Arnold made a movie where a company had made a rifle which used this technology in the sighting system and fired an energy bolt. He had to get behind appliances to hide from the sights.
I knew outer space was going to come into this eventually
OMG!!! I remember those.
I love it when phys org decides their thought experiments are the same as reality
.
That’s how ghosts do it.
Please forgive my poor excerpting, especially if the excerpts don’t mention that the laboratory research was done by scientists (not the magazine staff).
And what about Sugar Glass used in flim making so the stuntman do not get cut up?
Physics ping
Interesting. We had a post yesterday about infrared light being generated by human bodies and even plants because life is essentially an electrical,process.
It makes me think of Hopkins’ poem, “ That Nature is a Heraclitan Fire and the comfort of the Resurrection.”
Heraclitus believed that the world was made of fire and in a constant state of change.
But Hopkins writes of resurrected man that:
This Jack, joke, poor potsherd, ‘ patch, matchwood, immortal diamond,
Is immortal diamond.
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