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>I spent a college year solving partial differential equations by the
On Sun, 6 Apr 2025 20:43:38 +0000, gharnagel wrote:>career
On Sun, 6 Apr 2025 16:12:10 +0000, rhertz wrote:>
And CoE is KNOWN to be valid by engineers. I spent part of myanddealing with the problem of keeping laser diodes from overheatingINI can tell you that Electrical power in = [light power + heat power]
out.
>
And is dEin/dt = dL/dt + dH/dt simple enough for you? (Of course,
if the temperature rose too high, radiation loss would also have to
be included, but the laser diode would have ceased to operate long
before that became important). By your lights, CoE couldn't be
confirmed unless we measured that and everything else to 10^(-100)%.
And then, not even that!
>
It's not necessary to go into the quantum mechanics, solid state
physics, population inversion, or stimulated emission or optical
reflection at facets or anything else. If you disagree with that,
then you are:
>more stupid than what I thought once. An idiot without cure.>
Now THAT I can agree with :-))
>
>
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I respect your experience with laser diodes. It's OK, but this is A
LOCAL THING IN AN OPEN SYSTEM!
>
I question the validity of the "Law of Conservation of Energy" ONLYBEINGABSOLUTELY CLOSED, ISOLATED SYSTEMS, WITH EVERYTHING THAT EXISTSOUT!INTO THE MODEL.
>
CONTEMPLATE EVERYTHING IN YOUR LOCAL SYSTEM, UNTIL NOTHING IS LEFTOUT.>
Then tell me that LCE is a real thing. Some aspects that you missed:
>
- From where does the energy powering the laser diode? Describe the
chain of mechanisms that provide such power, until NOTHING IS LEFTTHEN>
- To where are going the energy of the laser beam and the generated
heat going?
Include every single subsystem IN THE CLOSED SYSTEM that gather
the generated energy, up to the last molecule, atom, electron.
>
Once you included everything, even quantum events, in your modelSYSTEM.YOU CAN TALK ABOUT A CLOSED SYSTEM, AND DO THE MATH TO PROVE THE LCE>
AS CORRECT-
>
Too complex for you? OF COURSE, as it is for everyone else.
By your lights, there is no such thing as you describe. Your "closed
system" is a canard. No reasonable engineer would characterize the
operation of laser diodes by including the losses in the electrical
power plant, line losses, and power supply. Don't you claim to be an
engineer, but engineers deal with "close enough for all practical
purposes." So you're NOT an engineer. Just WHAT are you?
>
Your assertion that "LCE" cannot be confirmed unless we do all your
"requirements" is false and irrelevant anyway. It is sufficient
to measure all the inputs and outputs to a system. That makes it
a closed system. An isolated system is harder to accomplish,
particularly with your unscientific requirement that everything
must be measured to 10,000,000+ significant figure accuracy.
>Then, TO SIMPLIFY, you start to let things OUT OF YOUR CLOSED0.0000001%?Then, with a little help of arithmetic you can claim: ENERGY IS
CONSERVED, YEAH! (But with which error margin? 0.1%, 0.001%,>simplest
Engineers understand that there is ALWAYS an error margin. Putting
a strait jacket on things like that on a physicist is hypocritical.
>Do you see? THINK CRITICALLY and then you'll question even thefaceslaw, like the Ohm Law.>
I've measured that, too, for all practical purposes. Of course,
diodes, etc. have nonlinear resistance. I've dealt with them, too,
and power still equals current times voltage.
>Got it? Physics IS A FARCE. Only applied engineering can save the>of retarded physicists, highly self-entitled imbeciles.>
>
Why do you accept things without DEEP QUESTIONING THEM?
Ah, but I DO. I questioned SR, so I considered all of the assumptions
until I understood them. All theories have domains of applicability.
Part of what true scientists do is understand those limits.
>
“The difference between genius and stupidity is that genius has its
limits”
-- Albert Einstein
There is a HUGE PROBLEM with classic and modern mathematics (calculus,
arithmetic, geometry, etc.).
>
They CAN'T HANDLE NONLINEARITIES. There are no theoretical solutions for
non-linear differential equation, nor even geometry (ellipse perimeter,
etc.), non-linear integro-differential equations AND SO ON.
>
So, the solutions are:
>
1) Express principles and laws of nature IN A LINEAR FORM.
2) If you got non-linear equations LINEARIZE THEM (Ebers-Moll transistor
model and small signal transistors models).
3) If you got into a problem with non-linear equations, then USE
COMPUTERIZED NUMERICAL MODELS, which break down non-linearities into
almost infinite interconnected segments.
>
This is applied to EVERY BRANCH OF PHYSICS, CHEMISTRY, ENGINEERING,
FINANCES, ETC.
Think of elliptic integrals, transcendental expressions for naturalMatter itself is nonlinear. That's the way nature is. But as I pointed
phenomena (like exponential decays, spiral 2D figures-Fibobacci curves,
etc.). Now try to find analytical solutions for models that contain
non-linear components, and tell me again that laws of conservation of
momentum and energy are perfectly described by LINEAR EQUATIONS. You
can't affirm that, and nobody couldn't nor can.
Besides the need to work with closed system that contain EVERYTHING,It's still Ein = Eout (in the steady state). Of course, it takes
science should work with CORRECT MATHEMATICAL EXPRESSIONS, which contain
non-linearities. Then, say goodbye to simplistic "LAWS" that you're
forced to accept since HS.
Criticizing the current framework of physics and its models isFew physicists accepted SR in the beginning. It's human nature to have
considered more heretic than questioning relativity.
SO, WE LIVE IN A WORLD OF APPROXIMATIONS, AND ANY DISCUSSION ABOUT THENOBODY with a thoughtful brain believes in "ABSOLUTE VALIDITY," except
ABSOLUTE VALIDITY OF EACH "LAW" IS SEVERELY PUNISHED. YOU'RE LABELED AS
LUNATIC, BEYOND CRANK NAME CALLING.
But, as isolated systems don't have a REAL existence because of theSince our measuring equipment isn't "absolutely" accurate, a system can
unknowns, any theory is just an approximation to the truth, which will
never be reached.
Think about the conservation of energy and momentum in the solar system.Who cares? You seem to believe that if a law is not "absolute" it
Now tell me how can you devise a closed system for it. How many
variables are left out?
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