A material/ substance that does not allow the through it

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Discussion Overview

The discussion revolves around the existence of materials or substances that do not allow magnetic fields to penetrate them. It explores concepts related to magnetic shielding, superconductors, and the implications for perpetual motion machines using magnetism and gravity.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant inquires about materials that completely block magnetic fields.
  • Another participant suggests researching "Magnetic Shielding" as a relevant topic.
  • A participant explains that Type 1 superconductors exhibit the Meissner effect, which allows them to expel magnetic fields up to a certain critical field strength.
  • It is noted that while superconductors are perfect diamagnets, they cannot exclude magnetic fields indefinitely, as they lose this property beyond a critical field.
  • A participant expresses gratitude for the information, indicating an interest in using these concepts for a perpetual motion machine involving magnetism and gravity.
  • Another participant humorously suggests that the information is only helpful if it leads to abandoning the quest for perpetual motion.
  • A participant shares their interpretation of gravity in relation to energy, asserting that a perpetual motion machine using gravity and magnetism does not violate energy conservation laws, while acknowledging the complexity of the topic.
  • One participant warns against the pursuit of perpetual motion, citing thermodynamic principles and urging caution against engaging in what they consider a futile endeavor.

Areas of Agreement / Disagreement

Participants express differing views on the feasibility of perpetual motion machines, with some supporting the exploration of the topic and others cautioning against it. There is no consensus on the validity of using gravity and magnetism for such machines.

Contextual Notes

The discussion includes assumptions about the properties of superconductors and diamagnetism, as well as the implications of energy conservation laws, which remain unresolved.

scupydog
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Has anyone invented a material/ substance that does not allow the field of a magnet through it
 
Physics news on Phys.org
Google: Magnetic Shielding
 
Superconductors also have that property. Specifically, Type 1 superconductors expel flux perfectly up to a critical field where they can no longer keep the field out. This is called the Meissner effect.
 
You can read up more on Diamagnetism. A superconductor is a perfect diamagnet, where it keeps magnetic fields from its interior. But a superconductor cannot keep a magnetic field out for all intensities. Once the critical field is met, it looses its perfect Diamagnetism and can no longer oppose magnetic fields.
 
thanks for your replies, very helpfull in my quest for a perpetual motion machine using magnetism and gravity
 
They're only helpful if they've convinced you to abandon the quest!
 
Reading another post about gravity being a type of energy, from which i derived it isn't. Therefore a PM machine using only gravity and magnetism does not break the law of energy conservation. I am sure there's more to it than that, if any could enlighten me i would be gratefull.https://www.physicsforums.com/showthread.php?t=138215
 
scupydog said:
Reading another post about gravity being a type of energy, from which i derived it isn't. Therefore a PM machine using only gravity and magnetism does not break the law of energy conservation. I am sure there's more to it than that, if any could enlighten me i would be gratefull.


https://www.physicsforums.com/showthread.php?t=138215

Perpetual motion is simply not allowed by thermodynamics. Please save yourself the time of a wild goose chase. If you insist on continuing, at least spare the poor readers of PF forum from yet another fruitless thread.

Thanks!
 

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