Thread View: bit.listserv.physhare
2 messages
2 total messages
Started by LUDVIK KOWALSKI
Sun, 15 May 1994 02:21
why charges attract
Author: LUDVIK KOWALSKI
Date: Sun, 15 May 1994 02:21
Date: Sun, 15 May 1994 02:21
30 lines
2597 bytes
2597 bytes
>I would like to suggest that Newton's Laws are indeed axioms and that
>Newton's approach was an axiomatic deductive one akin to what one finds in
>mathematics. Clearly the questions asked are philosophical ones, not
>scientific ones. The meaning such terms as why and explanation are open
>for discussion. An even more difficult term is "facts". I for one would
>not include any other the facts mentioned below as facts at all. What does
>one mean by fact anyway? another philosophical question!!!! Sad to say, I
>have no answers.
> Joseph Bellina (jbellina@saintmarys.edu)
Verifiable experimental data are facts in physics. They are often used as
starting points of theoretical considerations and we feel good when new
facts can be predicted by "pure reasoning". It is true that the words we use
to describe facts are often influenced by previous theoretical considerations
and that "pure facts" and "pure theories" are philosophical abstractions. But
why should we physicists be bothered by such nuances? What is wrong with a
statement that "attraction of electric charges is a fact of nature"?
Before answering you would probably ask for the meaning of the term "electric
charge". I would say that an electric charge is a physical quantity which is
measured, for example, with a ballistic galvanometer. You may object by
arguing that the functioning of that instrument is based on a theory which
can be traced to the law of attraction. And you would be right by saying
that a vicious cycle is created. But why should I be bothered by the
"chicken or the egg" dilemma when dealing with a particular egg or a
particular chicken? Clear distinctions between facts and theories can
usually be made in specific problems analyzed by physicists.
Ludwik Kowalski
Kowalski@Montclair.Apollo.edu.
Re: why charges attract
Author: Joe Bellina
Date: Thu, 19 May 1994 22:08
Date: Thu, 19 May 1994 22:08
47 lines
3427 bytes
3427 bytes
As you suggest, I don't have a problem with facts-in-a-context. I think it is what we physicists indeed use. I just have problems with abstractions to facts without context. On the other hand, I don't know how to ever make a clear distinction between fact and theory since they are so intertwined. It seems to me that any verifiable experimental date are know only in the context of some theory. Thus facts-in-the-context-of-a-theory are ok, but facts that are theory free, I'm not so sure. Enjoy In article <PHYSHARE%94051421233073@PSUVM.PSU.EDU>, LUDVIK KOWALSKI <KOWALSKI@APOLLO.MONTCLAIR.EDU> wrote: > >I would like to suggest that Newton's Laws are indeed axioms and that > >Newton's approach was an axiomatic deductive one akin to what one finds in > >mathematics. Clearly the questions asked are philosophical ones, not > >scientific ones. The meaning such terms as why and explanation are open > >for discussion. An even more difficult term is "facts". I for one would > >not include any other the facts mentioned below as facts at all. What does > >one mean by fact anyway? another philosophical question!!!! Sad to say, I > >have no answers. > > Joseph Bellina (jbellina@saintmarys.edu) > > Verifiable experimental data are facts in physics. They are often used as > starting points of theoretical considerations and we feel good when new > facts can be predicted by "pure reasoning". It is true that the words we use > to describe facts are often influenced by previous theoretical considerations > and that "pure facts" and "pure theories" are philosophical abstractions. But > why should we physicists be bothered by such nuances? What is wrong with a > statement that "attraction of electric charges is a fact of nature"? > > Before answering you would probably ask for the meaning of the term "electric > charge". I would say that an electric charge is a physical quantity which is > measured, for example, with a ballistic galvanometer. You may object by > arguing that the functioning of that instrument is based on a theory which > can be traced to the law of attraction. And you would be right by saying > that a vicious cycle is created. But why should I be bothered by the > "chicken or the egg" dilemma when dealing with a particular egg or a > particular chicken? Clear distinctions between facts and theories can > usually be made in specific problems analyzed by physicists. > > Ludwik Kowalski > Kowalski@Montclair.Apollo.edu. -- Joseph Bellina (jbellina@saintmarys.edu)
Thread Navigation
This is a paginated view of messages in the thread with full content displayed inline.
Messages are displayed in chronological order, with the original post highlighted in green.
Use pagination controls to navigate through all messages in large threads.
Back to All Threads