On 19/05/12 02:11, LaLALa wrote:
> On May 18, 4:51 am, Alfonso<
Alfo...@duffadd.com> wrote:
>
>>
>> Really you are missing the point. It is a question of the philosophical
>> basis of physics not a question of science.
>>
>> If one takes classical philosophy it is based upon the assumption that
>> cause precedes effect and that cause and effect are linked by some
>> physical process. Further that it is the role of science to try and
>> hypothesise, understand and mathematically quantify that physical
>> process. Based upon this philosophy LET is a far superior theory to
>> relativity in that it hypothesises a physical process and according to
>> the physical process hypothesised the change in light frequency is
>> indeed caused by a real change in the speed of light w.r.t the observer
>> but due to the effect on instruments of movement through the aether you
>> are unable to measure that change in speed.
>>
>> The new philosophy adopted around 1920 says that reality it beyond the
>> human mind. Mathematics is god a mathematical description *is* a physics
>> theory. It is a "physical" theory because it predicts a physical
>> outcome. "undersatanding" nature, or the physical process which the
>> mathematics describes is no longer considered a valid part of physics.
>>
>> "..time-ordered deterministic causality through a unique set of physical
>> states is abandoned." PD
>>
>
> I am fascinated, Mr. Alfonso. You obviously take the approach that one
> must first commit to a philosophy
Science is meaningless without an underlying philosophy. This isn't
obvious as a student absorbs the underlying philosophy from the ambience
of the subject.
> and never change from it
Did I say that?
and this
> will determine the course of how you do science forever after. It
> seems that by doing this if you ever change your philosophy then by
> definition you are no longer doing science because the science is
> wedded to that particular philosophy that you vowed ever to cherish
> and hold dear.
>
> I had no idea that science is an activity that is literally defined by
> a prior choice of philosophy.
Well you do now.
You might like to consider this lecture by someone with qualifications
in both Physics and philosophy.
http://arc-tv.com/the-crisis-in-physics-and-its-cause/
> I have only one question pertaining to this. Perhaps I am confused
> about the classical philosophy. If I understand you right a classical
> philosophy holds that every observed effect is traceable to some
> cause.
No. Every observed effect *has* a prior cause, it may or may not be
traceable.
"...the fact that an electron is so light that we cannot measure exactly
where it is without disturbing it does not mean that the electron's
location is not precisely defined; nor does it require that there must
be anything indeterminate about the electron itself as a particle, or
about its interactions with other particles. The point we have picked up
here is that the word "determinate" is not synonymous with "predictable
by mankind". Scott Murray
Put simply just because we have no way of finding out where an electron
is does not under classical philosophy mean that it doesn't have a
precise position. The new philosophy says:
"What is in principle unobservable should not at all be contained in our
conceptual scheme" Schrödinger.
Translated as - If you can't measure the position of an electron - it
doesn't have one.
This in turn leads to Schrödinger's Cat.
If you can't observe the state of the cat it it must have all states
allowed by the maths. Reality is beyond the human mind so what we think
of as "real" cannot be taken into consideration. If the maths says both
states are possible - then both states exist. The cat must be both alive
and dead up until the box is opened as per the mathematical description.
Classical philosophy accepts that we have some - though limited -
knowledge of reality. That the cat is either alive or dead and that what
the maths is describing is the state of our knowledge. What changes when
the box is opened is only our knowledge.
One can go a step further and do a autopsy and show that the cat has
been dead for at least half an hour which under classical philosophy is
proof that the cat was dead before the box was open.
The new philosophy rejects this argument on the grounds that physics is
only about prediction, not about understanding. Retrospective
measurement has no place. We should not try to understand nature as
reality is beyond the human mind.
Here is another example of retrospective measurement being rejected.
"On the one hand. a precise position measurement on the particle P in
the domain K yields the prediction of a very wide range of velocities
for P; and on the other hand, when the particle has been detected after
a time (delta t) in the spatial domain K', one can retrospectively
ascribe to P a quite sharp value of the velocity. namely KK'/(delta t),
and also a precise direction of motion. Isn’t it tempting to assert that
the particle P actually had the velocity KK'/(delta t), but
that quantum theory could not predict it'?"
In simple terms you cannot determine what the particles speed is, nor
what direction it will take but retrospectively you can determine what
it's speed was and which direction it took.
"... "Before the second measurement, it is ubiquitous in the cloud (it
is not a particle at all)".... "You have not found a particle at K', you
have produced one there!". Indeed, if this is so, the location K is not
relevant for the "particle" detected at K', and there is no reason left
to ascribe it the velocity KK'/(delta t)."
Found in "Schrödinger's philosophy of quantum mechanics" By Michel
Bitbol. The quotes are Schrödinger's.
This is the Copenhagen interpretation that the act of measurement
creates the result. The act of opening the box creates the result of the
cat being both alive or dead and prior to that it is both.
The maths is king. If the maths says that a photon can head off in any
number of directions Classical philosophy says that it sets off in a
particular direction the result of a definite but indeterminable causal
sequence. There are fundamental reasons why we cannot determine that
causal sequence and the maths describes our knowledge of the probability
as to which direction it takes.
The new philosophy (Copenhagen interpretation) says that a photon sets
off in all possible directions allowed by the maths and is created - as
a particle of light - by the act of detection.
The new philosophy (Many Worlds interpretation) says that a photon sets
off in a specific direction but that there are an infinite number of
parallel universes and it sets off in all possible directions in one or
another of them. It arrives at all possible points in some universe or
other and happens to arrive at where it does in ours. It also says that
when the box is opened the cat is alive in some universes and dead in
others.
Why is this important? Surely all that philosophy does is view the same
thing differently? No. If you accept that the maths relating to
Schrodingers cat may relate to our knowledge and not accurately describe
the system the whole basis of theoretical physics is undermined. It is
based on being able to make statements such as "This equation *shows*
.....(this that or the other)" Not on "if we understood the reality of
the system we might know what this equation represents".
And in the classical philosophy as embodied by Isaac Newton
> physical causes are all associated with something that can be called a
> force in the sense that Newton wrote in his famous second law of
> motion. And yet this same Newton said that there is an observed effect
> called continued motion that happens in the complete absence of force.
> Not the initial motion but the continuation of the motion. So I must
> be confused about how the observed effect of continuation of motion
> can be ascribed to a force (cause) and at the same time to the
> complete absence of force. Maybe you can help since you are such a
> strong advocate of this classical philosophy.
I think you have misunderstood Newton. Whether Newton's