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magnetics
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I was looking through a book on magnetism and it had the attached diagrams of field lines and stated that the classical diagram of field lines exiting the N pole and entering the S pole is incorrect. They claim their diagram is the correct representation of the magnetic field lines.
Their rationale is that if you take a long bar magnet, there is a strong magnetic attraction at the ends but very little in the middle.
But isn't this observation due to field gradients? That is, the field lines curve at the ends of a bar magnet and the field is strongly inhomogeneous, while at the middle of the bar magnet the field lines are almost parallel and the field is almost homogeneous.
Thank you.
Their rationale is that if you take a long bar magnet, there is a strong magnetic attraction at the ends but very little in the middle.
But isn't this observation due to field gradients? That is, the field lines curve at the ends of a bar magnet and the field is strongly inhomogeneous, while at the middle of the bar magnet the field lines are almost parallel and the field is almost homogeneous.
Thank you.