Introduction In an article published in Wireless World, December 1978, Ivor Catt published a criticism of the Maxwell displacement current that provoked considerable controversy. This article had a significant impact on my thinking as I had always had reservations regarding the displacement current concept in electromagnetic theory. In fact, the idea of displacement current that […]

  Introduction In two different papers written as responses to the Catt Question, two Italian physicists have interpreted the Catt Question as an anomaly or paradox. The response of Ivor Catt to this assertion is simply that the Catt Question is “just a question”. This may seem an unimportant point, but in their paper the […]

Here I publish a link to a paper submitted by Stephen Crothers to IOP Physics Education Journal On an Apparent Resolution of the Catt Question. The editor replied with the following: “We regret to inform you that the Board Member has recommended that your article should not be published in the journal, for the reasons […]

Introduction Many people have difficulty in understanding the Catt Question. This is understandable given the inconsistency and confusion that is produced by the current definition of electricity. (Here is the original formulation of the question.) It will probably come as a surprise to the reader that there is no clear and precise definition of electricity. […]

Introduction This report documents a study of Milky Way dust filaments that appear in photographs of external galaxies. The technique used in this investigation is the use of software photograph processing tools called effects filters. The software used here is the On One Photo Perfect Effects 9. This allows the adjustment of digital photos to […]