How was it discovered in the 19th century that electric or magnetic forces were not instantaneous?How did Maxwell conclude that light is an electromagnetic wave?How did scientists plot complicated graphs in the 19th century?What was taught in 19th century European electricity and/or magnetism courses?Who discovered the magnetic vector potential, $vecA$?Was the pre-special relativity discussion a hot topic in the late nineteenth and early twentieth century?Historically how it was discovered that we need fields to describe matter?Was the telegraph system of 1859 powered by AC or DC and how extensive was it?How did people measure electric charge at the time of Coulomb?How did Reginald Fessenden realize that spark-gaps could generate waves and the modulation of those waves with voice?What were the 3 critical experiments and the argument given by Ampère which helped in determining the magnetic field made by electric current?
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How was it discovered in the 19th century that electric or magnetic forces were not instantaneous?
How did Maxwell conclude that light is an electromagnetic wave?How did scientists plot complicated graphs in the 19th century?What was taught in 19th century European electricity and/or magnetism courses?Who discovered the magnetic vector potential, $vecA$?Was the pre-special relativity discussion a hot topic in the late nineteenth and early twentieth century?Historically how it was discovered that we need fields to describe matter?Was the telegraph system of 1859 powered by AC or DC and how extensive was it?How did people measure electric charge at the time of Coulomb?How did Reginald Fessenden realize that spark-gaps could generate waves and the modulation of those waves with voice?What were the 3 critical experiments and the argument given by Ampère which helped in determining the magnetic field made by electric current?
$begingroup$
Marc Lange writes (page 29)
It was known by about the 19th century that any action at a distance involving electric or magnetic forces would be retarded and so undermine not only spatial locality, but also temporal locality.
How was it discovered in the 19th century that electric or magnetic forces were not instantaneous?
I would be interested in survey articles, but I am mainly interested in reading how those who discovered the result described what they found.
Lange, M. (2002). An Introduction to the Philosophy of Physics Locality, Fields, Energy, and Mass. Blackwell Publishing.
electromagnetism
asked May 6 at 15:21
Frank HubenyFrank Hubeny
15018
$endgroup$
add a comment |
$begingroup$
Marc Lange writes (page 29)
It was known by about the 19th century that any action at a distance involving electric or magnetic forces would be retarded and so undermine not only spatial locality, but also temporal locality.
How was it discovered in the 19th century that electric or magnetic forces were not instantaneous?
I would be interested in survey articles, but I am mainly interested in reading how those who discovered the result described what they found.
Lange, M. (2002). An Introduction to the Philosophy of Physics Locality, Fields, Energy, and Mass. Blackwell Publishing.
electromagnetism
asked May 6 at 15:21
Frank HubenyFrank Hubeny
15018
$endgroup$
$begingroup$
Does Mr. Lange provide a reference or bibliography entry for his claim? (one would hope so!)
$endgroup$
– Carl Witthoft
2 days ago
$begingroup$
@CarlWitthoft He does not provide a reference, but I don't think it is relevant to his philosophical, rather than historical, approach to fields. He explains why he focuses on electromagnetic fields rather than gravitational fields. The belief in instantaneous propagation is not strong.
$endgroup$
– Frank Hubeny
2 days ago
add a comment |
$begingroup$
Marc Lange writes (page 29)
It was known by about the 19th century that any action at a distance involving electric or magnetic forces would be retarded and so undermine not only spatial locality, but also temporal locality.
How was it discovered in the 19th century that electric or magnetic forces were not instantaneous?
I would be interested in survey articles, but I am mainly interested in reading how those who discovered the result described what they found.
Lange, M. (2002). An Introduction to the Philosophy of Physics Locality, Fields, Energy, and Mass. Blackwell Publishing.
electromagnetism
asked May 6 at 15:21
Frank HubenyFrank Hubeny
15018
$endgroup$
Marc Lange writes (page 29)
It was known by about the 19th century that any action at a distance involving electric or magnetic forces would be retarded and so undermine not only spatial locality, but also temporal locality.
How was it discovered in the 19th century that electric or magnetic forces were not instantaneous?
I would be interested in survey articles, but I am mainly interested in reading how those who discovered the result described what they found.
Lange, M. (2002). An Introduction to the Philosophy of Physics Locality, Fields, Energy, and Mass. Blackwell Publishing.
electromagnetism
electromagnetism
asked May 6 at 15:21
Frank HubenyFrank Hubeny
15018
asked May 6 at 15:21
Frank HubenyFrank Hubeny
15018
asked May 6 at 15:21
Frank HubenyFrank Hubeny
15018
asked May 6 at 15:21
Frank HubenyFrank Hubeny
15018
asked May 6 at 15:21
Frank HubenyFrank Hubeny
15018
15018
$begingroup$
Does Mr. Lange provide a reference or bibliography entry for his claim? (one would hope so!)
$endgroup$
– Carl Witthoft
2 days ago
$begingroup$
@CarlWitthoft He does not provide a reference, but I don't think it is relevant to his philosophical, rather than historical, approach to fields. He explains why he focuses on electromagnetic fields rather than gravitational fields. The belief in instantaneous propagation is not strong.
$endgroup$
– Frank Hubeny
2 days ago
add a comment |
$begingroup$
Does Mr. Lange provide a reference or bibliography entry for his claim? (one would hope so!)
$endgroup$
– Carl Witthoft
2 days ago
$begingroup$
@CarlWitthoft He does not provide a reference, but I don't think it is relevant to his philosophical, rather than historical, approach to fields. He explains why he focuses on electromagnetic fields rather than gravitational fields. The belief in instantaneous propagation is not strong.
$endgroup$
– Frank Hubeny
2 days ago
$begingroup$
Does Mr. Lange provide a reference or bibliography entry for his claim? (one would hope so!)
$endgroup$
– Carl Witthoft
2 days ago
$begingroup$
Does Mr. Lange provide a reference or bibliography entry for his claim? (one would hope so!)
$endgroup$
– Carl Witthoft
2 days ago
$begingroup$
@CarlWitthoft He does not provide a reference, but I don't think it is relevant to his philosophical, rather than historical, approach to fields. He explains why he focuses on electromagnetic fields rather than gravitational fields. The belief in instantaneous propagation is not strong.
$endgroup$
– Frank Hubeny
2 days ago
$begingroup$
@CarlWitthoft He does not provide a reference, but I don't think it is relevant to his philosophical, rather than historical, approach to fields. He explains why he focuses on electromagnetic fields rather than gravitational fields. The belief in instantaneous propagation is not strong.
$endgroup$
– Frank Hubeny
2 days ago
add a comment |
1 Answer
1
active
oldest
votes
$begingroup$
This was noticed when observations of eclipses of Jupiter satellites deviated from
prediction. Before that there could be only speculations (and these speculations existed from antiquity). Jupiter satellites
gave the first hard evidence.
From the very beginning, Jupiter satellites were proposed by Galileo as a natural clock for determination of longitude. For that reason, very careful observations were made, and finally the disagreement with Kepler laws was found.
This happened in 17th century.
Romer and Huygens conjectured that the reason is the finite speed of light and measured it (assuming that Jupiter satellites do obey Kepler laws). They obtained
a number which was not very precise but of the right order of magnitude.
Since then observations were made more and more precise.
By the way, Jupiter satellites gave the most precise way of synchronizing clocks
at different locations (=measuring of longitude) until the invention of telegraph.
But the method could only be applied on land, not on a ship.
https://gizmodo.com/how-the-speed-of-light-was-first-measured-1138348467
That other electromagnetic oscillations are spread with the same speed as light was discovered by Maxwell.
answered May 6 at 16:18
Alexandre EremenkoAlexandre Eremenko
26.6k13996
$endgroup$
$begingroup$
This turns the question into "when was it realized that light was an electric and/or magnetic force"?
$endgroup$
– Mark
May 6 at 20:27
$begingroup$
@Mark: But this is well known: Maxwell made this discovery.
$endgroup$
– Alexandre Eremenko
May 6 at 21:14
$begingroup$
You should probably add that to your answer, then.
$endgroup$
– Mark
May 6 at 21:15
$begingroup$
Are there experiments that show electric attraction or magnetism travel at finite speed? (Without using light and drawing the conclusion from Maxwell by computation.) Can it be observed directly?
$endgroup$
– Gerald Edgar
2 days ago
$begingroup$
@Gerald Edgar: Nowadays, yes. Every time you measure a distance to an object with a radar, you use this finite speed. Also when you communicate with an object in the space, sufficiently remote. But of course radio waves were discovered after Maxwell, and due to Maxwell.
$endgroup$
– Alexandre Eremenko
2 days ago
|
show 3 more comments
Your Answer
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
This was noticed when observations of eclipses of Jupiter satellites deviated from
prediction. Before that there could be only speculations (and these speculations existed from antiquity). Jupiter satellites
gave the first hard evidence.
From the very beginning, Jupiter satellites were proposed by Galileo as a natural clock for determination of longitude. For that reason, very careful observations were made, and finally the disagreement with Kepler laws was found.
This happened in 17th century.
Romer and Huygens conjectured that the reason is the finite speed of light and measured it (assuming that Jupiter satellites do obey Kepler laws). They obtained
a number which was not very precise but of the right order of magnitude.
Since then observations were made more and more precise.
By the way, Jupiter satellites gave the most precise way of synchronizing clocks
at different locations (=measuring of longitude) until the invention of telegraph.
But the method could only be applied on land, not on a ship.
https://gizmodo.com/how-the-speed-of-light-was-first-measured-1138348467
That other electromagnetic oscillations are spread with the same speed as light was discovered by Maxwell.
answered May 6 at 16:18
Alexandre EremenkoAlexandre Eremenko
26.6k13996
$endgroup$
$begingroup$
This turns the question into "when was it realized that light was an electric and/or magnetic force"?
$endgroup$
– Mark
May 6 at 20:27
$begingroup$
@Mark: But this is well known: Maxwell made this discovery.
$endgroup$
– Alexandre Eremenko
May 6 at 21:14
$begingroup$
You should probably add that to your answer, then.
$endgroup$
– Mark
May 6 at 21:15
$begingroup$
Are there experiments that show electric attraction or magnetism travel at finite speed? (Without using light and drawing the conclusion from Maxwell by computation.) Can it be observed directly?
$endgroup$
– Gerald Edgar
2 days ago
$begingroup$
@Gerald Edgar: Nowadays, yes. Every time you measure a distance to an object with a radar, you use this finite speed. Also when you communicate with an object in the space, sufficiently remote. But of course radio waves were discovered after Maxwell, and due to Maxwell.
$endgroup$
– Alexandre Eremenko
2 days ago
|
show 3 more comments
$begingroup$
This was noticed when observations of eclipses of Jupiter satellites deviated from
prediction. Before that there could be only speculations (and these speculations existed from antiquity). Jupiter satellites
gave the first hard evidence.
From the very beginning, Jupiter satellites were proposed by Galileo as a natural clock for determination of longitude. For that reason, very careful observations were made, and finally the disagreement with Kepler laws was found.
This happened in 17th century.
Romer and Huygens conjectured that the reason is the finite speed of light and measured it (assuming that Jupiter satellites do obey Kepler laws). They obtained
a number which was not very precise but of the right order of magnitude.
Since then observations were made more and more precise.
By the way, Jupiter satellites gave the most precise way of synchronizing clocks
at different locations (=measuring of longitude) until the invention of telegraph.
But the method could only be applied on land, not on a ship.
https://gizmodo.com/how-the-speed-of-light-was-first-measured-1138348467
That other electromagnetic oscillations are spread with the same speed as light was discovered by Maxwell.
answered May 6 at 16:18
Alexandre EremenkoAlexandre Eremenko
26.6k13996
$endgroup$
$begingroup$
This turns the question into "when was it realized that light was an electric and/or magnetic force"?
$endgroup$
– Mark
May 6 at 20:27
$begingroup$
@Mark: But this is well known: Maxwell made this discovery.
$endgroup$
– Alexandre Eremenko
May 6 at 21:14
$begingroup$
You should probably add that to your answer, then.
$endgroup$
– Mark
May 6 at 21:15
$begingroup$
Are there experiments that show electric attraction or magnetism travel at finite speed? (Without using light and drawing the conclusion from Maxwell by computation.) Can it be observed directly?
$endgroup$
– Gerald Edgar
2 days ago
$begingroup$
@Gerald Edgar: Nowadays, yes. Every time you measure a distance to an object with a radar, you use this finite speed. Also when you communicate with an object in the space, sufficiently remote. But of course radio waves were discovered after Maxwell, and due to Maxwell.
$endgroup$
– Alexandre Eremenko
2 days ago
|
show 3 more comments
$begingroup$
This was noticed when observations of eclipses of Jupiter satellites deviated from
prediction. Before that there could be only speculations (and these speculations existed from antiquity). Jupiter satellites
gave the first hard evidence.
From the very beginning, Jupiter satellites were proposed by Galileo as a natural clock for determination of longitude. For that reason, very careful observations were made, and finally the disagreement with Kepler laws was found.
This happened in 17th century.
Romer and Huygens conjectured that the reason is the finite speed of light and measured it (assuming that Jupiter satellites do obey Kepler laws). They obtained
a number which was not very precise but of the right order of magnitude.
Since then observations were made more and more precise.
By the way, Jupiter satellites gave the most precise way of synchronizing clocks
at different locations (=measuring of longitude) until the invention of telegraph.
But the method could only be applied on land, not on a ship.
https://gizmodo.com/how-the-speed-of-light-was-first-measured-1138348467
That other electromagnetic oscillations are spread with the same speed as light was discovered by Maxwell.
answered May 6 at 16:18
Alexandre EremenkoAlexandre Eremenko
26.6k13996
$endgroup$
This was noticed when observations of eclipses of Jupiter satellites deviated from
prediction. Before that there could be only speculations (and these speculations existed from antiquity). Jupiter satellites
gave the first hard evidence.
From the very beginning, Jupiter satellites were proposed by Galileo as a natural clock for determination of longitude. For that reason, very careful observations were made, and finally the disagreement with Kepler laws was found.
This happened in 17th century.
Romer and Huygens conjectured that the reason is the finite speed of light and measured it (assuming that Jupiter satellites do obey Kepler laws). They obtained
a number which was not very precise but of the right order of magnitude.
Since then observations were made more and more precise.
By the way, Jupiter satellites gave the most precise way of synchronizing clocks
at different locations (=measuring of longitude) until the invention of telegraph.
But the method could only be applied on land, not on a ship.
https://gizmodo.com/how-the-speed-of-light-was-first-measured-1138348467
That other electromagnetic oscillations are spread with the same speed as light was discovered by Maxwell.
answered May 6 at 16:18
Alexandre EremenkoAlexandre Eremenko
26.6k13996
edited May 6 at 21:16
answered May 6 at 16:18
Alexandre EremenkoAlexandre Eremenko
26.6k13996
answered May 6 at 16:18
Alexandre EremenkoAlexandre Eremenko
26.6k13996
answered May 6 at 16:18
Alexandre EremenkoAlexandre Eremenko
26.6k13996
26.6k13996
$begingroup$
This turns the question into "when was it realized that light was an electric and/or magnetic force"?
$endgroup$
– Mark
May 6 at 20:27
$begingroup$
@Mark: But this is well known: Maxwell made this discovery.
$endgroup$
– Alexandre Eremenko
May 6 at 21:14
$begingroup$
You should probably add that to your answer, then.
$endgroup$
– Mark
May 6 at 21:15
$begingroup$
Are there experiments that show electric attraction or magnetism travel at finite speed? (Without using light and drawing the conclusion from Maxwell by computation.) Can it be observed directly?
$endgroup$
– Gerald Edgar
2 days ago
$begingroup$
@Gerald Edgar: Nowadays, yes. Every time you measure a distance to an object with a radar, you use this finite speed. Also when you communicate with an object in the space, sufficiently remote. But of course radio waves were discovered after Maxwell, and due to Maxwell.
$endgroup$
– Alexandre Eremenko
2 days ago
|
show 3 more comments
$begingroup$
This turns the question into "when was it realized that light was an electric and/or magnetic force"?
$endgroup$
– Mark
May 6 at 20:27
$begingroup$
@Mark: But this is well known: Maxwell made this discovery.
$endgroup$
– Alexandre Eremenko
May 6 at 21:14
$begingroup$
You should probably add that to your answer, then.
$endgroup$
– Mark
May 6 at 21:15
$begingroup$
Are there experiments that show electric attraction or magnetism travel at finite speed? (Without using light and drawing the conclusion from Maxwell by computation.) Can it be observed directly?
$endgroup$
– Gerald Edgar
2 days ago
$begingroup$
@Gerald Edgar: Nowadays, yes. Every time you measure a distance to an object with a radar, you use this finite speed. Also when you communicate with an object in the space, sufficiently remote. But of course radio waves were discovered after Maxwell, and due to Maxwell.
$endgroup$
– Alexandre Eremenko
2 days ago
$begingroup$
This turns the question into "when was it realized that light was an electric and/or magnetic force"?
$endgroup$
– Mark
May 6 at 20:27
$begingroup$
This turns the question into "when was it realized that light was an electric and/or magnetic force"?
$endgroup$
– Mark
May 6 at 20:27
$begingroup$
@Mark: But this is well known: Maxwell made this discovery.
$endgroup$
– Alexandre Eremenko
May 6 at 21:14
$begingroup$
@Mark: But this is well known: Maxwell made this discovery.
$endgroup$
– Alexandre Eremenko
May 6 at 21:14
$begingroup$
You should probably add that to your answer, then.
$endgroup$
– Mark
May 6 at 21:15
$begingroup$
You should probably add that to your answer, then.
$endgroup$
– Mark
May 6 at 21:15
$begingroup$
Are there experiments that show electric attraction or magnetism travel at finite speed? (Without using light and drawing the conclusion from Maxwell by computation.) Can it be observed directly?
$endgroup$
– Gerald Edgar
2 days ago
$begingroup$
Are there experiments that show electric attraction or magnetism travel at finite speed? (Without using light and drawing the conclusion from Maxwell by computation.) Can it be observed directly?
$endgroup$
– Gerald Edgar
2 days ago
$begingroup$
@Gerald Edgar: Nowadays, yes. Every time you measure a distance to an object with a radar, you use this finite speed. Also when you communicate with an object in the space, sufficiently remote. But of course radio waves were discovered after Maxwell, and due to Maxwell.
$endgroup$
– Alexandre Eremenko
2 days ago
$begingroup$
@Gerald Edgar: Nowadays, yes. Every time you measure a distance to an object with a radar, you use this finite speed. Also when you communicate with an object in the space, sufficiently remote. But of course radio waves were discovered after Maxwell, and due to Maxwell.
$endgroup$
– Alexandre Eremenko
2 days ago
|
show 3 more comments
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$begingroup$
Does Mr. Lange provide a reference or bibliography entry for his claim? (one would hope so!)
$endgroup$
– Carl Witthoft
2 days ago
$begingroup$
@CarlWitthoft He does not provide a reference, but I don't think it is relevant to his philosophical, rather than historical, approach to fields. He explains why he focuses on electromagnetic fields rather than gravitational fields. The belief in instantaneous propagation is not strong.
$endgroup$
– Frank Hubeny
2 days ago