Thread: Is light constant at all?

1. Re: Special Theory of Gravity

No, Chuck.
When you are working with the speed of light in a vacuum, you can run a calculation using "c" to represent the speed of light.
Because the speed of light is equal to the value of the constant "c."

However, if you are running a calculation where light interacts with a medium, "v" is used to represent the speed of light.
The value of "c" does not change.

2. Re: Special Theory of Gravity

The speed of light does not change if you set c = 1 (for a unit time; the vacuum energy without spin/gravity in the parking lot in one positive dimension - there is no momentum in a conserved relativistic system where only rest energy is relevant).

I have just produced a .pdf to show how the vacuum energy relates to the Dirac matrix in terms of STR:

The Pauli/Dirac Matrices (too much tex to write here, until I can get the whole thing done) ,

in the Relativity section of my website, and will be continuing to show its relation to the Pauli matrices in the coming weeks (STR and GTR)....

The topic of Signal Processing and Analysis is pure mathematics without explicit mass ....
(the Dirac delta function is a unit impulse in "time"; "an area" - i.e., an abstract "amplitude" integrated to unity). It is related to QFT by the Green's function.

3. Re: Special Theory of Gravity

Originally Posted by BuleriaChk
The speed of light does not change if you set c = 1 (for a unit time; the vacuum energy without spin/gravity in the parking lot in one positive dimension - there is no momentum in a conserved relativistic system where only rest energy is relevant).
The constant "c" is never set to "1." It has a constant value! It does not change, will not change, cannot be calculated as anything other than exactly 299792458m/s.
Period.
Your entire Red Herring of Hogwash is based on your misconceptions about a simple constant.

4. Re: Special Theory of Gravity

I have updated my pdf The Pauli/Dirac Matrices to include the as derived from the relativistic Dirac matrix.

c is only a constant if it is only one photon in the parking lot at a mass creation rate of 299792458 g/s where its total mass is given by = 299792458 g for a time interval of one sec in one dimension.

(Or a ruler with the length of 299792458 m for a time interval of one second in one dimension (line-of-sight).

If the line of sight changes by the introduction of mass, the "speed" of light will change due to gravity.

Inside the steel plate things are somewhat different (especially if there is no parking lot).
And, of course, other wavelengths are not considered in this model, so there is no color...
(the "wow" of physics)......

5. Re: Special Theory of Gravity

The laser is made of (electromagnetic) light. The laser takes longer to burn through the plate of steel than travel through an empty parking lot by a factor of v/c. Therefore the speed of light is slower when it is burning through the steel. Steel is a medium. Therefore light slows down in the presence of a medium.

(Imagine the parking lot being made of a solid block of steel)

If light doesn't slow down, there must not be a medium.

(Or at least not one you'd notice intuitively, since by human observation (eyeballing) the speed of light is instantaneous, in the parking lot anyway (so Newton's laws apply).

(Nevertheless, I am delighted to hear you have faith in your own existence..
(and don't have to perform actual experiments.

qed sheesh.....

6. Re: Special Theory of Gravity

Originally Posted by BuleriaChk
c is only a constant if it is only one photon in the parking lot at a mass creation rate of 299792458 g/s where its total mass is given by = 299792458 g for a time interval of one sec in one dimension.

(Or a ruler with the length of 299792458 m for a time interval of one second in one dimension (line-of-sight).

If the line of sight changes by the introduction of mass, the "speed" of light will change due to gravity.
No, the group velocity of light is measured at less than "c" in a medium but that does not change the constant "c;" it means that the speed of light is denoted by "v" and not "c."

You can only calculate the speed of light denoting it as "c" when it is measured to move at that upper bound. If the Group Velocity is less than "c" then you denote the speed of light with "v."

7. Re: Special Theory of Gravity

Now I know what Copernicus felt like'

Suppose the parking lot is a swimming pool, and you are a fish, but the pool is lighted. If you measured light you would call it c, since it is the fastest information speed you would know. If somehow you could compare it with the parking lot, you would assume light traveled faster in the parking lot.

OTH, if you mean by "c" c = 1 when there is only one photon in the whole universe, so m = ct = x and ct is a length representing inertial mass, then for a unit time, x = ct = 1^2. OTH, if there was another photon in the universe, it could have a different mass m = c't for the same defined "time" t. (this is because velocity is irrelevant to the analysis, since only the initial and final states are germane, not vt'. So I can adjust either c or t for the different mass.

That's why v/c is a RATIO in relativity. By changing labels, I can call it c/v.
If c = 0 for v/c then mass is doesn't exist (only v which now becomes c...

If c = 1, then Newton's laws apply; e.g. P = m(v/1) = mv for Galilean coordinates....
but momentum = (Pc)^2 for Relativity.

In the Lorentz transform (as opposed to the "time dilation" equation) v/c has three possibilities:

1. v/c < 1 (a photon has been radiated from the initial condition c/c=1, so the final condition is less than the initial condition (c > v)
2. the system is stable at c/c = 1 - the system does not change (c = v)
3. v/c > 1 which means that a photon has been absorbed, so the energy of the final system is greater than the initial condition. (v > c )

This actually works for "time dilation" if you just specify so t' = t at v = c so you don't divide by zero.

c is a constant ONLY in the sense that it is an arbitrary reference to which v is compared. For measurements on earth, the uncertainty principle applies, but it is difficult to perform experiments because our test equipment must be configured using electromagnetism, and the energy of a single photon is very small. Nevertheless, photon - on photo energy interaction via polarization interaction has been measured in the parking lot.

If the parking lot were on Jupiter, the reference value of c would have a different value than that on earth (we could call it gravity, but don't have to)........

c being an absolute number is all in your mind, unless you're proselytizing a religion.... not to mention a number base.... without an experimental value it is completely arbitrary (if 0, there is nothing in the Universe, and it is truly all in your mind...)

8. Re: Special Theory of Gravity

What a load of complete and total nonsense. Next you will be saying the real numbers are Religion, too. Simply because they don't arbitrarily change value.

I can keep repeating the correction to your error, Chuck.

The constant "c" has a value of 299792458m/s.
That does not change.
When making a calculation of a photon or a beam in a vacuum, it is permissible to denote the speed of light as "c."
However, when the Group Velocity of a beam of light passes through a medium, then the speed is denoted by "v" and not by "c."
Constants are constants.
Consistency is not a religion.

You are just spewing forth large posts of complete nonsense, misconceptions and faulty calculations/assumptions. You are ignorant about physics. You have no idea what you are talking about.

9. re: Is light constant at all?

Comparing yourself to Copernicus just added another point to your Baez Crank-o-meter scale.

10. re: Is light constant at all?

Neverfly not only knows nothing about solid state physics, STR, linear algebra. electromagnetism, Newton's laws, or much of anything else except his religious faith in some mysterious god he calls "c", he also knows nothing about philosophy....

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