On Sun, Sep 7, 2025 at 10:22 AM Alan Grayson <agrayson2...@gmail.com> wrote:

*> Please repeat your comment about the probability being cos(theta), under
> what conditions. TY, AG *
>

*This is what I said on November 10 of last year:  *


*If 2 billion years ago a correlated pair of photons was created, and 1
billion years later I randomly pick an axis (let's call that 0 degrees) and
set my polarizing filter to that axis, then regardless of which axis I
choose there is a 50% chance the photon will make it through and a 50%
chance it will not, let's suppose it does not. One billion years later you
arbitrarily pick an axis and you set your polarizing filter to that axis.
If you just happen to pick the same axis I did, because most correlated
photons are anti-correlated, there is a 100% chance the other entangled
photon will make it through your filter. But if for example the axis that
you picked is 30 degrees different than mine then there is only a 75%
chance your photon will make it through your filter; this is because  [COS
(X)]^2 =0.75 if  X = 30 DEGREES (π/6 radians).*

*If you use that [COS (X)]^2 rule (see above) about polarized light, which
has been known for centuries, and if the strange behavior in the quantum
world is caused by local hidden variables, then certain correlations are
impossible; however experiments have shown that those
correlations ARE possible, therefore the strange behavior of the quantum
world cannot be due to local hidden variables.   *

*>Do these other Graysons have the same memory as I do*


*Certainly! All the other other Alan Graysons** have the exact same
memories that you have because they all share the exact same past, however
they experience a different present and as a result a different future too.
Sometimes the difference is tiny, sometimes the difference is huge. *

*> So, in this "reality", there are at least a countably infinite number of
> Grayson pairs, *


*Maybe, maybe not. As I've said before, on the finite versus infinite
question Many Worlds is agnostic. But at the very least there are one hell
of a lot of worlds, that's why it's called "Many Worlds" .  *

* John K Clark    See what's on my new list at  Extropolis
<https://groups.google.com/g/extropolis>*
*3e2*

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