11. However, at terahertz, infrared and visible frequencies, natural materials have a very weak magnetic coupling component, or permeability. 12. Sonically destructive Magnetic coupling between the coils is negated by highly efficient magnetic shields around the upper coil. 13. Low-frequency magnetic systems will require more shielding than radio-frequency systems due to their use of near-field magnetic coupling . 14. These will usually be with their axes at right angles to each other to reduce magnetic coupling between them. 15. For example, some theoretical methods ( DFT ) may not be appropriate to solve magnetic coupling or electron transitions properties. 16. If the tube is made of metal, the float position is transferred to an external indicator via a magnetic coupling . 17. Magnetic coupling between two magnets can also be used to mechanically transfer power without contact, as in the magnetic gear.18. Also, as part of periodic composite structure these are designed to have a stronger magnetic coupling than is found in nature. 19. Ribbons have traditionally been incapable of high output ( large magnet gaps leading to poor magnetic coupling is the main reason ). 20. The more reliable solution is the magnetic coupling , which makes no physical contact, so will never be subject to failing by wear.
