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Polarized light — pls review before final exam, Thurs

Sunday, August 13th, 2017

[ by Charles Cameron — actually the exam is daily, ongoing — and we’re not scoring very high marks ]
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Unpolarized light vibrates in any planes:

A light wave that is vibrating in more than one plane is referred to as unpolarized light. Light emitted by the sun, by a lamp in the classroom, or by a candle flame is unpolarized light. Such light waves are created by electric charges that vibrate in a variety of directions, thus creating an electromagnetic wave that vibrates in a variety of directions. This concept of unpolarized light is rather difficult to visualize. In general, it is helpful to picture unpolarized light as a wave that has an average of half its vibrations in a horizontal plane and half of its vibrations in a vertical plane.

Polarized light vibrates in only one plane:

It is possible to transform unpolarized light into polarized light. Polarized light waves are light waves in which the vibrations occur in a single plane. The process of transforming unpolarized light into polarized light is known as polarization.

The most common method of polarization involves the use of a Polaroid filter. Polaroid filters are made of a special material that is capable of blocking one of the two planes of vibration of an electromagnetic wave. .. In this sense, a Polaroid serves as a device that filters out one-half of the vibrations upon transmission of the light through the filter. When unpolarized light is transmitted through a Polaroid filter, it emerges with one-half the intensity and with vibrations in a single plane; it emerges as polarized light.

This works either way — so to speak, either vertically, or horizontally — though not, by definition, both at once. Ohh, and there’s paradox involved:

Read the whole lesson at The Physics Classroom: Polarization — and memorize, remember?

**

Ali Soufan notices polarization in our political sphere wrt events we label or do not label terrorist:

NPR likewise:

Tim Furnish sees this polarization as avoiding mention of Islamic influence when it is clearly present:

And then there’s this:

Sebastian Gorka told MSNBC

Gorka in full:

Sometimes an attack is unequivocally clear for what it is. When somebody shouts ALlahu Akbar as they’re stabbing a police officer, it’s pretty clear it’s not a case of the mafia robbing a bank, wouldn’t you say so?

Eh?

Vox is oppositely polarized to Gorka et alii:

As, indeed, am I.

**

Incientally, all you special ops types with cool shades:

For lightweight, functional shades that protect your eyes in any lighting situation, Oakley has designed the SI Flak Jacket. Featuring an innovative 8.75 base lens curvature for optimal peripheral vision, these sunglasses provide side eye protection as well as a maximal field of view. The stress-resistant O-Matter frame found in many Oakley tactical models is lightweight, ergonomic and will not succumb to the pressures of constant wear and travel. The Plutonite polycarbonate lenses fully filter out harmful UVA, UVB, UVC and blue light up to 400 nm for maximum sun protection. Oakley also has included an Iridium coating on the lenses which reduces glare in extremely bright light. For adaptability in any environment, the lenses are easily interchangeable. « less

Take heed:

Polarization has a wealth of other applications besides their use in glare-reducing sunglasses.

Like — in USian politics?

**

Okay, time for the test. Sample question:

Answer:

A. Referring to the above question, the glare is the result of a large concentration of light aligned parallel to the water surface. To block such plane-polarized light, a filter with a vertically aligned polarization axis must be used.

Matryoshka Trump

Thursday, July 20th, 2017

[ by Charles Cameron — NYorker invokes the nested dolls archetype — not kind to Trump ]
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You already know that I sit up and take special notice when certain forms (symmetries, helices, ouroboroi, etc) show up — because forms are a particularly powerful way in which the mind orders its world, or because the world teaches the mind that it is ordered in formal ways, take your pick — well, one of those forms is the nested form called Matryoshka, which I’ve discussed before:

  • Nesting Buddhas and insubstantiality
  • ISIS goes Matryoshka
  • **

    Imagine, then, my interest to read today’s New Yorker post, Valley of the Russian Dolls: A Hollow, Repetitive Form Proves Perfect for Trump.

    **

    I invite you to read the article yourself to learn about Halina Danchenko. who sells Matryoshka dolls. Shoppers are asked not to open the dolls on display in her stone themselves — however “If you want to see what’s inside the leader of the free world, Danchenko will open him for you.”

    The article is witty, if you share her perspective:

    Trump, who is as matronly as a big bullying man can be, already has the de-facto physique of a nesting doll (and something very like the shellac)

    The dolls are witty too, or should I say catty? Read about the two Trump sets that the article describes in detail..

    **

    If you think Trump is father to a host of lies, as the NYT does, why then this article will amuse you, and conversely, if you see him as a straight-shooting man of truth, not so much.

    The writer, Kathryn Schulz, is clearly in the first category:

    Never has a President seemed so entirely hollow as Trump, so intellectually and morally vacant. Nor has any Administration, so early in its tenure, concealed such a lengthy series of deceptions, or grown so bizarrely, fatally fractal: its lawyers have lawyers, its scandals have sub-scandals, its lies have little lie-lets. It’s easy to imagine, given this prevailing opacity and the incompetence of those nominally in charge, that there is another Trump Russian doll out there, this one filled up with actual Russians.

    And her conclusion:

    That might or might not prove to be the truth about what’s going on inside Donald Trump politically. What’s going on psychologically is a different story. All of us are largely hidden from one another, our most important attributes by definition invisible: minds, hearts, psyches, consciences, souls. Even for ourselves, we can access these aspects only through sustained introspection, a habit anathema to Trump; other people, meanwhile, reveal their innermost selves to us chiefly through their actions. On that evidence, the most accurate Trump doll is the one made of Donalds all the way down: utterly full of himself, in all other ways utterly empty.

    Realpolitik as if angels were real

    Tuesday, June 20th, 2017

    [ by Charles Cameron — I mean, are they or aren’t they? — really? — what do you believe? ]
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    St Michael, of the archangelic rank or choir

    **

    It’s just a thought I entertain from time to time. Because if they are, if angels are real — as bookloads by the dozens, popularly read, attest — why then they may know something, and they may surely accomplish something.

    **

    Thomas Aquinas asks and answers the Question, Whether an angel is altogether incorporeal?. Along the way, he quotes St John Damascene:

    an angel is an ever movable intellectual substance.

    Angels are forms of intelligence — is the Intelligence Community listening?

    **

    When the boy’s eyes were opened, as per the prayer of Elisha (2 Kings 6:17), he saw:

    and, behold, the mountain was full of horses and chariots of fire round about Elisha

    and the Lord speaking to Muhammad (Qur’an 8:9):

    I shall reinforce you with a thousand angels riding behind you.

    Angels are perhaps force-multipliers. Is DOD interested?

    **

    Angels may be beings of music and dance — gandharvas, apsarases — is theirs a language our intelligence recognizes?

    **

    But I digress. Intelligence has a long history with the invisibles. Abbot Trithemius may be called first among cryptologists. Elizabeth I’s John Dee would have been at home to Bletchley Park (though Walsingham might have tossed out his amanuensis, Edward Kelley). Talmudic scholrs would do well to teach at Quantico, Jesuits at Fort Meade. Their remit, from Ephesians 6.12:

    For we wrestle not against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this world, against spiritual wickedness in high places.

    **

    An aside: in his Himalayan attempt to fathom angels, Aquinas makes an instructive statement:

    Now the medium compared to one extreme appears to be the other extreme, as what is tepid compared to heat seems to be cold

    Left and right, how often do we get caught in that trap in these divisive times?

    Catching up with Carson

    Saturday, June 17th, 2017

    [ by Charles Cameron — always amazed when theology makes its way into politics ]
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    I missed this when it first appeared, but wanted to capture it now I’ve found it (via a Lewis Black routine) —

    Seems the amateur theologian Ben Carson — who relies heavily on his professional status as a neurosurgeon for credibility — thinks amateurs get the job done way better than professionals. Whether that opinion will lead to better ship-building by, eg, Hyundai, Samsung and Daewoo is another question: they may or may not take note of Biblical precedent in this matter.

    The trouble with Providence

    Friday, June 16th, 2017

    [ by Charles Cameron — the Virginia shooting — providence, like grace, is whole cloth, or it is nothing ]
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    The basic paradox: I thank God Steve Scalise is still among the living, may he fully and speedily recover

    **

    The trouble with Providence is that it makes more sense to the survivors than, on the whole, the deceased or those who grieve them. My father, gunnery officer on the British light cruiser Sheffield, survived the superior firepower of the German heavy cruiser Hipper in the Battle of the Barents Sea, and no doubt that was providential from my own perspective — I was born around elevn months later. Providential, too, it must have been on a larger scale — the Hipper was crippled:

    When told of the news, Hitler flew into a rage. He referred to his ships as useless and decided on the spot that the High Seas Fleet should be scrapped. Admiral Raeder, commander of the Kriegsmarine, tended his resignation and was replaced by Admiral Dönitz.

    My father’s guns, along with those of the Sheffield’s companion cruiser Jamaica, together disabled the Hipper.

    Providential, three — in that same engagement, shrapnel knocked one of the eyes of Captain Robert St. V. Sherbrooke, commanding a contingent of British destroyers from Onslow, out of its socket, such is war, an incident which Sherbrooke ignored in the interest of continuing his command, and for which he later received the Victoria Cross, such is war. Such is war, such is providence, forty of Sherbrooke’s men on the Onslow lost their lives in the same two minutes in which he lost his eye.

    **

    I report all this because Glenn Beck just invoked Providence in the matter of the Congressional baseball practice shooting:

    We have an amazing story to tell of what I believe is Divine Providence. I just — I want you to think of one thing. Imagine what America would be like today, if yesterday the leadership of the G.O.P. and the majority of the G.O.P., 10 percent of the G.O.P. and Congress were dead. If we had coffins that we were facing today instead of one coffin of the shooter and one still in critical condition, what would the conversation be like today?

    I’ve often said, you’re going to wake up on a Monday, and by Friday, your country will be completely different. I believe that is coming. But I do believe we saw Divine Providence happen yesterday. So that didn’t happen this week.

    So providence postpones what it can’t altogether prevent?

    **

    Glenn Beck, apparently — because he’s a Mormon, or a Christian more generally, or a believer, even more ecumenically, or a human, or at least a sentient being — or because he’s a media personality? — can serve as a spokesman for Providence:

    Barry, let me — let me take you now to Divine Providence.

    Beck is addressing Congressman Barry Loudermilk, who was present at the practice, who was himself a target — unlike Glenn — shot at, and providentially spared. It’s providential that we have Beck’s voice to explain to Loudermilk what happened..

    I will tell you — I’ve seen some bad shots in my life. But for as many targets that were out on that field — and to have a rifle, I believe, Divine Providence played a role in keeping, you know, people safe yesterday. It is remarkable the number of rounds that were fired and the — the low number of people that were hit.

    Providence approves the critical wounding of one congressman and the avoidance of same in several other cases, eh?

    **

    Look, if I was one of the congresspersons who survived, I’d be more than a little inclined to thank providence — and if I didn’t survive, I wouldn’t be around to blame it. So here’s a special case of “history is written by the victors” — “belief in providence is written by the survivors”.

    The problem with providence as an explanation is that it tends to overlook those who didn’t survive its providential ministrations. And that’s a problem of cognitive dissonance, if one tries to extend providence past the individual usrvivor or group of survivors, to the world as a whole — or to the “next week” that Beck feels prrovidence is saving some potential victims for..

    Ruthlessly applied, providence comes for us all, as it has first devised us all — and all’s fair in love and hate, war and peace.

    Or unfair. Forget Glenn Beck, I’ll let you decide.

    **

    In a companion piece, Beck offers The Entire List of Who to Blame for the Attempted Slaughter of GOP House Members. Providence doesn’t catch any blame — and neither does the NRA, not Obama:

    Here’s the truth. The shooter is responsible, by himself — not the gun, not the bullets, not the gun industry … not the NRA, not the left, not the right, not the president, not the former president, not Hillary Clinton, not Antifa — no one. The shooter is responsible, period.

    Whee! And while we’re not blaming, or its corrollary, blaming, Glenn also posted The New York Times Runs the Worst Editorial in Human History, Blames SARAH PALIN for Giffords Shooting AGAIN

    **

    The SPLC reports:

    Gunman Who Fired on Congressional Baseball Team Consumed by Anti-Trump Anger

    There’s a specter here, if it’s not providence and it’s not any of the interested parties who are to blame. The specter is polarization.

    But that’s for a follow-up post on The physics of politics, god willing.


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