How to make a magnet repulsive flying machine?
Answers
Explanation:
Magnets don't interfere with X-rays themselves, but can affect the X-ray tube's electron beam, defocussing it
Answer:
If you had a strong enough magnet, could you create a flying machine by counteracting Earth's magnetic field?
Not really. We have all sorts of very strong magnets, but we don't see them levitating in Earth's magnetic field.
In order to get magnet to float in the air you need reasonably strong opposing field in the direction of Earth gravity. In most places on Earth flux lines are more horizontal than vertical. But this doesn't matter, as the field itself is around 5 Gs, or 0.5 mT – which is very low to create any reasonable repulsion or attraction. But you can get a magnetic needle of a compass point North :-)
High temperature superconductors can do the job without active control, but the gap between the magnet and the superconductor must be reasonably small to create enough magnetic pressure that can support the weight: B^2/2mu0. Magnetic field drop very fast with distance in the air, so the distance must be small.
One of my experiments is shown on the photo below. A NdFeB magnet levitates above the bore of vertically oriented superconducting tube.
Next photo depicts famous demonstration experiment of a sumo fighter levitating while standing on strong magnetic disc platform above a high temperature superconducting base.
So you CAN have a levitating transportation system, but the distance between the vehicle and the base/rail will be in the order of 1–100 mm. But you can't fly really high using magnetic forces, and Earth's magnetic field isn't good for this.