Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > sci.physics > #528897 > unrolled thread

Interesting talk about Quantum Mechanics

Back to article view | Back to sci.physics

Contents

  Interesting talk about Quantum Mechanics dvus <dven1@adelphia.net> - 2015-10-29 09:13 -0400
    Re: Interesting talk about Quantum Mechanics dvus <dven1@adelphia.net> - 2015-10-29 16:15 -0400
      Re: Interesting talk about Quantum Mechanics jay moseley <jaymoseley@hotmail.com> - 2015-10-30 02:45 -0700

#528897 — Interesting talk about Quantum Mechanics

It's a little long (about an hour) but it raises some interesting questions.

https://www.youtube.com/watch?v=dEaecUuEqfc

dad

[toc] | [next] | [standalone]

#528950

On 10/29/2015 9:13 AM, dvus wrote:

> It's a little long (about an hour) but it raises some interesting
> questions.
>
> https://www.youtube.com/watch?v=dEaecUuEqfc
>
> dad

Please excuse the preceding post, I hit the wrong button.

-- 
dvus

[toc] | [prev] | [next] | [standalone]

#529100

Dvus wrote about lecture on polarization etc...

I dont mind this link although its a bit long with too much QT jargon
in the last half.
There are problems though. First, the most important part( around 19:00) is too hastily 
presented and not clear enough on the screen.
More importantly though, are the claims he makes about simple combinations
of polarizers being indicative somehow of QT magic or being counterintuitive etc...

At around 18:02 he shows us two linear polarizers at 90° to each other (L1 & L2)
with the predictable black no light being allowed through. But when an additional 
circular polarizer is placed in between the two orthogonally positioned linear polarizers
light suddenly is allowed through again. To me this seems easy to explain as the
circular polarizer converts the linear polarized light from the first linear polarizer L1
into circular polarized light which ( not being orthoganally linear anymore) will 
now pass through the second linear polarizer L2 unaffected. Although the presenter
doesnt actually make his big QT claim on this, he does start to say it is now a
"measurement"  that is being made somehow, as a lead in to his next QT erasing
claim. This is nonsense. No measurement has been made. Linear polarized 
light has been converted to circular polarized light which can go through any
subsequent linear polarizer unblocked.
Its the next claim which he makes which is total nonsense in my opinion.
He then adds a third linear polarizer L3, to the 'exit end' of the setup. (Just to recap ....
the setup is two linear with a circular inbetween.) He then rotates the new additional
linear polarizer L3 and light is allowed through at one angle but blocked if its 
rotated  90°

He then claims that this is somehow proof of some sort QT magic!

This is a spurious claim. All hes done is taken light thats come from 
a linear polarizer L2, and blocked it or let it through depending on the
angle hes positioned linear polarizer L3.
He forgets that the light that goes into linear polarizer L2 is circular
polarized light. Effectively it is the same as if it were unpolarized. (It is no
longer linear polarized from linear polarizer L1, although he pretends
it still is somehow)
Seeing as you posted this video can you comment on this ridiculous claim
it makes?

[toc] | [prev] | [standalone]

Back to top | Article view | sci.physics

csiph-web