The Dirtiest Fight in Physics Is About the Universe Itself
/ Ryan F. Mandelbaum Tuesday 11:45am /

Wherever you look in the cosmos, things don’t seem to add up.
Our human observations of the universe’s structure—
as far back as we can observe—
suggest that there’s around five times more mass
than we see in the galaxies, stars, dust, planets, brown dwarfs,
and black holes that telescopes have observed directly.
We call this mystery mass, or the mystery as a whole, “dark matter.”

Several thousand physicists researching these dark matter-
related mysteries will tell you that dark matter is a particle,
the way that electrons and protons are particles,
that only appears to interact with other known particles
via the gravitational pull of its mass.
But there are a few dozen physicists who instead think that a set of ideas
called “modified gravity” might one day explain these mysteries.
Modified gravity would do away with the need for dark matter via a tweak to the laws of gravity.

https://gizmodo.com/the-dirtiest-fight-in-physics-is-about-the-universe-its-1828562461

================

About ''real'' imaginary numbers in mathematics
and ''not-real'' imaginary numbers in physics.
#
Imaginary numbers are a fine and wonderful refuge
of the divine spirit almost an amphibian between
being and non-being.
/ Gottfried Leibniz /
#
One might think this means that imaginary numbers
are just a mathematical game having nothing to do
with the real world. From the viewpoint of positivist
philosophy, however, one cannot determine what is real.
All one can do is find which mathematical models
describe the universe we live in. It turns out that
a mathematical model involving imaginary time
predicts not only effects we have already observed
but also effects we have not been able to measure yet
nevertheless believe in for other reasons.
So what is real and what is imaginary?
Is the distinction just in our minds?
/ Stephen Hawking /
#
Pi is not merely the ubiquitous factor in high school
geometry problems; it is stitched across the whole
tapestry of mathematics, not just geometry's little
corner of it. Pi occupies a key place in trigonometry too.
It is intimately related to e, and to imaginary numbers.
Pi even shows up in the mathematics of probability
/ Robert Kanigel /
#
The more science I studied, the more I saw that physics
becomes metaphysics and numbers become imaginary
numbers. The farther you go into science, the mushier
the ground gets. You start to say, 'Oh, there is an order
and a spiritual aspect to science.'
/ Dan Brown /
======
Can imaginary numbers be real in physics ?
Can imaginary numbers show real substance in physics ?
================================

Phyxed 11 Field Goal
M. Faradave
Published on Aug 10, 2018
Phyxed (physics-fixed, better than real), where every episode begins with YOU!
This time, fields are the goal, as simply and classically modeled.
https://www.youtube.com/watch?v=BxaLoljALEM&t=188s

Black hole hologram appears in a graphene flake
30 Jul 2018 Belle Dumé
''. . . a material as simple as a graphene flake with an irregular
boundary subjected to an intense external magnetic field can be
used to create a quantum hologram that faithfully reproduces
some of the signature characteristics of a black hole.''
https://physicsworld.com/a/black-hole-hologram-appears-in-a-graphene-flake/

10 physics facts you should have learned in school but probably didn’t
Monday, July 30, 2018
1. Entropy . . . = 10
2. Quantum mechanics . . . = 5
3. Heavy particles . . .
4. Lines in Feynman diagrams . . .
5. Quantum mechanics . . . = 2
6. Quantum gravity . . .
7. Atoms . . .
8. Wormholes . . . . . black holes = 9
9. . . . . black hole = 8
10. Energy . . . . = 1
Posted by Sabine Hossenfelder
http://backreaction.blogspot.com/2018/07/10-physics-facts-you-should-have.html
======

The impossibly stubborn question at the heart of quantum mechanics
/ by Jim Baggott / August 2, 2018 /

Everybody knows by now that quantum mechanics is an extraordinarily
successful scientific theory, on which much of our modern,
tech-obsessed lifestyles depend. It is also completely mad.
Although the theory quite obviously works, we’re left to puzzle over what
we think it’s telling us, with all its ghosts and phantoms; its cats that are
at once both alive and dead; its collapsing wavefunctions; and its seemingly
“spooky” goings-on.
It leaves us with a rather desperate desire to lie down quietly in a darkened room.. . .

https://www.prospectmagazine.co.uk/science-and-technology/the-impossibly-stubborn-question-at-the-heart-of-quantum-mechanics

============

  About ''real'' imaginary numbers in mathematics
and ''not-real'' imaginary numbers in physics.
#
Imaginary numbers are a fine and wonderful refuge
of the divine spirit almost an amphibian between
being and non-being.
/ Gottfried Leibniz /
#
One might think this means that imaginary numbers
are just a mathematical game having nothing to do
with the real world. From the viewpoint of positivist
philosophy, however, one cannot determine what is real.
All one can do is find which mathematical models
describe the universe we live in. It turns out that
a mathematical model involving imaginary time
predicts not only effects we have already observed
but also effects we have not been able to measure yet
nevertheless believe in for other reasons.
So what is real and what is imaginary?
Is the distinction just in our minds?
  / Stephen Hawking /
#
Pi is not merely the ubiquitous factor in high school
geometry problems; it is stitched across the whole
tapestry of mathematics, not just geometry's little
corner of it. Pi occupies a key place in trigonometry too.
It is intimately related to e, and to imaginary numbers.
Pi even shows up in the mathematics of probability
/ Robert Kanigel /
#
The more science I studied, the more I saw that physics
becomes metaphysics and numbers become imaginary
numbers. The farther you go into science, the mushier
the ground gets. You start to say, 'Oh, there is an order
and a spiritual aspect to science.'
/ Dan Brown /
======
Can imaginary numbers be real in physics ?
Can imaginary numbers show real substance in physics ?
==================================

  Physicists lost reality in Mathematics
a)
1905 - Einstein involved negative time in  SRT
( nobody knew what negative time really was)
b)
1908 - Minkowski  said that Einstein's  equations look ''ugly''
And he gave beautiful mathematical  solution changing
Einstein's ''ugly'' negative time into a positive time.
Minkowski  explained his solution as a  ''space-cone''
Today professors say to students:
''you cannot be physicists if you don't understand  Minkowski's
beautiful mathematical solution'' 
( but nobody explains  what ''space-cone''  or 4-D  really is )
c)
Then in 1919  Kaluza and  O.Klein  involved  5-D
And  in 1969  ''string''- physicists involved 11-D, 27-D, M-D 
These  super - D  have never been observed, but physicists believe
that they are on the right way

You cannot do more complex arithmetic if you don't know what  2+2 = 4
and if you don't know what 4-D really  is,  then more complex dimensions
are only  mathematical play for mathematicians
====
a) Classic view: dimension = direction
There are Descartes' three dimensions in space as
three directions in space. The point where all directions
are united shows place where object is.
We don't need more dimension, 3-D is enough to solve problem.
Looking on watch we know at what time object was in this point.

b) Minkowskki view:
there are four dimensions in space as four direction in space
but this ''space'' is not ordinary it is very specific '' an absolute spacetime''.
In this ''absolute spacetime'' we don't know the point and time
where object is exactly.
=====

10 physics facts you should have learned in school but probably didn’t
Monday, July 30, 2018
1. Entropy . . . = 10
2. Quantum mechanics . . . = 5
3. Heavy particles . . .
4. Lines in Feynman diagrams . . .
5. Quantum mechanics . . . = 2
6. Quantum gravity . . .
7. Atoms . . .
8. Wormholes . . . . . black holes = 9
9. . . . . black hole = 8
10. Energy . . . . = 1
Posted by Sabine Hossenfelder
http://backreaction.blogspot.com/2018/07/10-physics-facts-you-should-have.html
===

  Lorentz Transformation
Transformation between two frames of reference.
/ how interaction between two ''frames of reference''
actually work according to what our common
''market''  sense  might say /
My opinion
a) one reference frame is  ''Fixed frame'' and has constant light speed
/ constant light speed has "proper - frozen time" /
b) another RF is ''Moving frame'' and doesn't have constant light speed
/ the '' frozen time'' in this RF became ''warm'' and ''slower'' /
c)  Lorentz transformations solve their interaction.
===