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"Veritasium" (YT) - "The Big Misconception About Electricity" ?

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adx:

--- Quote from: SilverSolder on February 21, 2022, 02:38:11 pm ---
--- Quote from: adx on February 21, 2022, 02:30:38 pm ---[...]
No bites on the laserpointer thing yet.

--- End quote ---

OK let's go there...    The beam would curve, like the water coming out of a rapidly swung garden hose...   the speed never changes!

--- End quote ---

Have to get up pretty early on a Sunday morning to catch people out here!

My idea was an incompetent restatement of this:
https://en.wikipedia.org/wiki/Speed_of_light

--- Quote ---If a laser beam is swept quickly across a distant object, the spot of light can move faster than c, although the initial movement of the spot is delayed because of the time it takes light to get to the distant object at the speed c. However, the only physical entities that are moving are the laser and its emitted light, which travels at the speed c from the laser to the various positions of the spot. Similarly, a shadow projected onto a distant object can be made to move faster than c, after a delay in time.[43] In neither case does any matter, energy, or information travel faster than light.[44]

--- End quote ---

I was wondering how many people can't separate the idea of light travelling in a straight line as an effectively instantaneous phenomenon, with light having a speed.

aetherist:

--- Quote from: eugene on February 21, 2022, 07:44:14 pm ---
--- Quote from: adx on February 21, 2022, 02:30:38 pm ---[snip]
https://en.wikipedia.org/wiki/Speed_of_gravity
"...between -3×10-15 and +7×10-16 times the speed of light"
--- End quote ---
Wait... what?

I skimmed the page you linked to. It offers an extensive history of the subject and lists quite a few different speeds as predicted by different scientists, but, in the end, the consensus seems to be that speed of gravity = c.

But that's old physics. It includes relativity, etc, but it's still old in the context of this thread. It's exciting to be a part of history in the making.   :-DD
--- End quote ---
Its mainly baloney. LIGO is rubbish. As we will all find out shortly, after they bring some new sites into being (India Australia etc).
There is no such thing as a gravity wave.
Gravity propagates at at least 20 billion c, not at c, nothing about gravity has a speed of c.
Even Einstein did no believe in quadrupolar GWs, or, at least, he believed that if they existed then they could not carry or transmit energy.


adx:

--- Quote from: eugene on February 21, 2022, 07:44:14 pm ---
--- Quote from: adx on February 21, 2022, 02:30:38 pm ---[snip]
https://en.wikipedia.org/wiki/Speed_of_gravity
"...between -3×10-15 and +7×10-16 times the speed of light"

--- End quote ---

Wait... what?

I skimmed the page you linked to. It offers an extensive history of the subject and lists quite a few different speeds as predicted by different scientists, but, in the end, the consensus seems to be that speed of gravity = c.

But that's old physics. It includes relativity, etc, but it's still old in the context of this thread. It's exciting to be a part of history in the making.   :-DD

--- End quote ---

But Wikipedia says so and if I can imagine it's right then what's to say it isn't?  :)

Oops, yes, or "krapp", genuine incompetence on my part there. I was so focussed on getting the superscripts to behave I forgot to think about the missing 1+ and 1- (or whatever way around it is). Negative reality inversion narrowly averted.

aetherist:

--- Quote from: adx on February 22, 2022, 01:05:43 am ---
--- Quote from: SilverSolder on February 21, 2022, 02:38:11 pm ---
--- Quote from: adx on February 21, 2022, 02:30:38 pm ---[...]No bites on the laserpointer thing yet.
--- End quote ---
OK let's go there...    The beam would curve, like the water coming out of a rapidly swung garden hose...   the speed never changes!
--- End quote ---
Have to get up pretty early on a Sunday morning to catch people out here!
My idea was an incompetent restatement of this:
https://en.wikipedia.org/wiki/Speed_of_light
--- Quote ---If a laser beam is swept quickly across a distant object, the spot of light can move faster than c, although the initial movement of the spot is delayed because of the time it takes light to get to the distant object at the speed c. However, the only physical entities that are moving are the laser and its emitted light, which travels at the speed c from the laser to the various positions of the spot. Similarly, a shadow projected onto a distant object can be made to move faster than c, after a delay in time.[43] In neither case does any matter, energy, or information travel faster than light.[44]
--- End quote ---
I was wondering how many people can't separate the idea of light travelling in a straight line as an effectively instantaneous phenomenon, with light having a speed.

--- End quote ---
Dont forget light propagates at c throo the aether.
Actually Einstein said that light is slowed by the presence of mass. Which everyone ignores. So, light always propagates at less than c, koz there is nowhere in the universe that is not near mass.

Anyhow the speed of light is c+V pr c-V where V is the aetherwind.
Likewise the speed of electricity depends on direction.

And, the max relative speed is 2c, koz something can be going at c in one direction & something else at c in the opposite direction.

adx:

--- Quote from: aetherist on February 22, 2022, 01:07:29 am ---...
There is no such thing as a gravity wave.
Gravity propagates at at least 20 billion c ...

--- End quote ---
Uh? What does it propagate as then?

Negative reality wave? Leprechaun kinesin?

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