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| Started by | Sam Wormley <swormley1@gmail.com> |
|---|---|
| First post | 2015-09-17 20:32 -0500 |
| Last post | 2015-09-18 13:21 -0700 |
| Articles | 6 — 4 participants |
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Hey -- Are Faraday cages less effective than previously thought? Sam Wormley <swormley1@gmail.com> - 2015-09-17 20:32 -0500
Re: Hey -- Are Faraday cages less effective than previously thought? jimp@specsol.spam.sux.com - 2015-09-18 03:32 +0000
Re: For the jimp: http://www.yellowpages.com/rancho-cucamonga-ca/anger-management-classes Sam Wormley <swormley1@gmail.com> - 2015-09-18 08:28 -0500
Re: shit head displays his ignorance jimp@specsol.spam.sux.com - 2015-09-18 17:48 +0000
Why Faraday cages are less effective than stooopid people previously thought? benj <nobody@gmail.com> - 2015-09-18 01:02 -0400
Re: Hey -- Are Faraday cages less effective than previously thought? Double-A <double-a3@hush.com> - 2015-09-18 13:21 -0700
| From | Sam Wormley <swormley1@gmail.com> |
|---|---|
| Date | 2015-09-17 20:32 -0500 |
| Subject | Hey -- Are Faraday cages less effective than previously thought? |
| Message-ID | <_7WdnSbU8PgG9GbInZ2dnUU7-QOdnZ2d@giganews.com> |
Are Faraday cages less effective than previously thought? > http://physicsworld.com/cws/article/news/2015/sep/15/are-faraday-cages-less-effective-than-previously-thought > Is the Faraday cage in your lab less effective than you think? A new > study by applied mathematicians at the University of Oxford suggests > that the mesh wire cages may not be as good at shielding > electromagnetic radiation as previously thought. The team has > identified a flaw in the conventional understanding of how the > effectiveness of a Faraday cage changes as the wires are moved closer > together. Even though engineers might have realized this effect > experimentally, this mathematical discovery could improve the design > of these cages. > > The physicist Michael Faraday came up with the idea of using a > conducting wire-mesh cage to block electromagnetic fields in 1836. A > familiar modern example of such a cage is the mesh screen on a > microwave oven door, which is designed to keep microwaves in while > allowing us to watch our food as it cooks. A solid metal cage offers > the best protection from electromagnetic waves, but Faraday and many > scientists since have assumed that mesh is a good enough > approximation of a solid metal cage. Specifically, many had believed > that the electric field within the cage rapidly approaches zero as > the wires get closer together. In the 1960s, for example, the Nobel > laureate Richard Feynman gave a famous series of physics lectures at > Caltech that included a short discussion on Faraday cages that has > since been adapted in many textbooks and physics lectures. He assumed > constant electric charge, and argued that the electric field > approaches zero exponentially within the cage. > -- sci.physics is an unmoderated newsgroup dedicated to the discussion of physics, news from the physics community, and physics-related social issues.
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| From | jimp@specsol.spam.sux.com |
|---|---|
| Date | 2015-09-18 03:32 +0000 |
| Message-ID | <98dscc-hl3.ln1@mail.specsol.com> |
| In reply to | #521749 |
Sam Wormley <swormley1@gmail.com> wrote: > Are Faraday cages less effective than previously thought? No, spamming shit head, because in the real world if you are going to the trouble of building one you measure the effectiveness, you worthless, cut and paste, spamming piece of shit. -- Jim Pennino
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| From | Sam Wormley <swormley1@gmail.com> |
|---|---|
| Date | 2015-09-18 08:28 -0500 |
| Subject | Re: For the jimp: http://www.yellowpages.com/rancho-cucamonga-ca/anger-management-classes |
| Message-ID | <_7WdnVnU8PgdjGHInZ2dnUU7-QOdnZ2d@giganews.com> |
| In reply to | #521772 |
On 9/17/15 10:32 PM, jimp@specsol.spam.sux.com wrote: > No, spamming shit head, because in the real world if you are going > to the trouble of building one you measure the effectiveness, you > worthless, cut and paste, spamming piece of shit. For the jimp: http://www.yellowpages.com/rancho-cucamonga-ca/anger-management-classes Are Faraday cages less effective than previously thought? > http://physicsworld.com/cws/article/news/2015/sep/15/are-faraday-cages-less-effective-than-previously-thought > Is the Faraday cage in your lab less effective than you think? A new > study by applied mathematicians at the University of Oxford suggests > that the mesh wire cages may not be as good at shielding > electromagnetic radiation as previously thought. The team has > identified a flaw in the conventional understanding of how the > effectiveness of a Faraday cage changes as the wires are moved closer > together. Even though engineers might have realized this effect > experimentally, this mathematical discovery could improve the design > of these cages. > > The physicist Michael Faraday came up with the idea of using a > conducting wire-mesh cage to block electromagnetic fields in 1836. A > familiar modern example of such a cage is the mesh screen on a > microwave oven door, which is designed to keep microwaves in while > allowing us to watch our food as it cooks. A solid metal cage offers > the best protection from electromagnetic waves, but Faraday and many > scientists since have assumed that mesh is a good enough > approximation of a solid metal cage. Specifically, many had believed > that the electric field within the cage rapidly approaches zero as > the wires get closer together. In the 1960s, for example, the Nobel > laureate Richard Feynman gave a famous series of physics lectures at > Caltech that included a short discussion on Faraday cages that has > since been adapted in many textbooks and physics lectures. He assumed > constant electric charge, and argued that the electric field > approaches zero exponentially within the cage. -- sci.physics is an unmoderated newsgroup dedicated to the discussion of physics, news from the physics community, and physics-related social issues.
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| From | jimp@specsol.spam.sux.com |
|---|---|
| Date | 2015-09-18 17:48 +0000 |
| Subject | Re: shit head displays his ignorance |
| Message-ID | <1dvtcc-2o8.ln1@mail.specsol.com> |
| In reply to | #521796 |
Sam Wormley <swormley1@gmail.com> wrote: > On 9/17/15 10:32 PM, jimp@specsol.spam.sux.com wrote: >> No, spamming shit head, because in the real world if you are going >> to the trouble of building one you measure the effectiveness, you >> worthless, cut and paste, spamming piece of shit. > > > > For the jimp: For the ass hat piece of shit spammer: It seems that the spamming shit head is too ignorant of the real world to comment on my response. Such is to be expected from an ignorant, spamming, cut and paste shit head. -- Jim Pennino
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| From | benj <nobody@gmail.com> |
|---|---|
| Date | 2015-09-18 01:02 -0400 |
| Subject | Why Faraday cages are less effective than stooopid people previously thought? |
| Message-ID | <zVMKx.29497$7S1.22039@fx30.iad> |
| In reply to | #521749 |
On 09/17/2015 09:32 PM, Sam Wormley wrote:
> Are Faraday cages less effective than previously thought?
>> http://physicsworld.com/cws/article/news/2015/sep/15/are-faraday-cages-less-effective-than-previously-thought
>>
>
>
>> Is the Faraday cage in your lab less effective than you think? A new
>> study by applied mathematicians at the University of Oxford suggests
>> that the mesh wire cages may not be as good at shielding
>> electromagnetic radiation as previously thought. The team has
>> identified a flaw in the conventional understanding of how the
>> effectiveness of a Faraday cage changes as the wires are moved closer
>> together. Even though engineers might have realized this effect
>> experimentally, this mathematical discovery could improve the design
>> of these cages.
>>
>> The physicist Michael Faraday came up with the idea of using a
>> conducting wire-mesh cage to block electromagnetic fields in 1836. A
>> familiar modern example of such a cage is the mesh screen on a
>> microwave oven door, which is designed to keep microwaves in while
>> allowing us to watch our food as it cooks. A solid metal cage offers
>> the best protection from electromagnetic waves, but Faraday and many
>> scientists since have assumed that mesh is a good enough
>> approximation of a solid metal cage. Specifically, many had believed
>> that the electric field within the cage rapidly approaches zero as
>> the wires get closer together. In the 1960s, for example, the Nobel
>> laureate Richard Feynman gave a famous series of physics lectures at
>> Caltech that included a short discussion on Faraday cages that has
>> since been adapted in many textbooks and physics lectures. He assumed
>> constant electric charge, and argued that the electric field
>> approaches zero exponentially within the cage.
Lucky you cut and pasted this Sammy, because if Oxford is just now
learning about Faraday shields, well, obviously once again you have no clue.
The article said: "He joined forces with Oxford's Jon Chapman and David
Hewett to study the problem, but it soon became apparent to the team
that this rapid convergence to zero electric field does not happen."
And everybody wonders why I constantly rag on the stooopidity of people
like you and others who buy into all the myths of physics...Like the
field being ZERO inside a Faraday shield. This is simply WRONG. The
field is NEVER zero unless the external source is zero. And the higher
the frequency gets the worse it is.
Why do I end up having to explain physics to all the clowns here
pretending to be so smart? Go ask HVAC why the shield is never perfect.
You can even ask him to explain "evanescent waves" to you.
Go ahead. I DARE you.
--
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\:\~\:\/:/ / \:\~\:\ \/__/ \/__|:|/:/ / \::/ /
\:\ \::/ / \:\ \:\__\ |:/:/ / \/__/
\:\/:/ / \:\ \/__/ |::/ /
\_:/__/ \:\__\ /:/ /
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| From | Double-A <double-a3@hush.com> |
|---|---|
| Date | 2015-09-18 13:21 -0700 |
| Message-ID | <f919f410-c352-4200-95ad-b6a2d99ece36@googlegroups.com> |
| In reply to | #521749 |
On Thursday, September 17, 2015 at 6:32:15 PM UTC-7, Sam Wormley wrote: > Are Faraday cages less effective than previously thought? > > http://physicsworld.com/cws/article/news/2015/sep/15/are-faraday-cages-less-effective-than-previously-thought > > > > Is the Faraday cage in your lab less effective than you think? A new > > study by applied mathematicians at the University of Oxford suggests > > that the mesh wire cages may not be as good at shielding > > electromagnetic radiation as previously thought. The team has > > identified a flaw in the conventional understanding of how the > > effectiveness of a Faraday cage changes as the wires are moved closer > > together. Even though engineers might have realized this effect > > experimentally, this mathematical discovery could improve the design > > of these cages. > > > > The physicist Michael Faraday came up with the idea of using a > > conducting wire-mesh cage to block electromagnetic fields in 1836. A > > familiar modern example of such a cage is the mesh screen on a > > microwave oven door, which is designed to keep microwaves in while > > allowing us to watch our food as it cooks. A solid metal cage offers > > the best protection from electromagnetic waves, but Faraday and many > > scientists since have assumed that mesh is a good enough > > approximation of a solid metal cage. Specifically, many had believed > > that the electric field within the cage rapidly approaches zero as > > the wires get closer together. In the 1960s, for example, the Nobel > > laureate Richard Feynman gave a famous series of physics lectures at > > Caltech that included a short discussion on Faraday cages that has > > since been adapted in many textbooks and physics lectures. He assumed > > constant electric charge, and argued that the electric field > > approaches zero exponentially within the cage. It took them until now to figure that out? Double-A
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