Magnetic field in perfect conductor

[paweld]

Why in perfect conductor magnetic field B vanishes? It's often assumed while
considering wave guides.

 

[Antiphon]

Induced currents equal to the magnetic field flow on the exterior of the perfect conductor and prevent the field from extending into the conductor.

 

[Meir Achuz]

Only oscillating magnetic fields vanish in a perfect conductor.
A static magnetic field is possible.

 

[Born2bwire]

Only oscillating magnetic fields vanish in a perfect conductor.
A static magnetic field is possible.

But not in super conductors. However, super conductors have a slightly different set of properties than perfect conductors but I have seen people confuse the two.