By: Jim Virkler; ©2009 Our many recent posts on the electromagnetic spectrum have been long on description, but perhaps short on explanation. We explained some of the physical characteristics of…
By: Jim Virkler; ©2009 In my childhood days I recall the anxious voice of my mother announcing to the family that a “long distance” call from an out-of-state relative had…
By: Jim Virkler; ©2009 Many people at or beyond retirement age fondly remember the excitement of mailing in 25 cents and a cereal box top, then waiting anxiously for the…
By: Jim Virkler; ©2009 One distant memory of my childhood involves visits to the shoe store. Many such establishments had shoe-fitting fluoroscopes. These machines sent X-rays through shoe, flesh, and…
By: Jim Virkler; ©2009 How do we react to a flood? Of course, it would depend on which type of flood we are talking about. I refer again to the…
By: Jim Virkler; ©2009 Before discussing the reality of another portion of the invisible electromagnetic spectrum, I’ll ask my readers to join me on a field trip. Some of the…
By: Jim Virkler; ©2009 When we flip on a light switch, wonderful things happen. In a subjective sense, our path is illuminated and objects become visible. But in a scientific…
By: Jim Virkler; ©2009 Science terms or definitions are necessary, but knowing a definition and understanding a subject are sometimes not the same. With that disclaimer, I’ll offer this definition…
By: Jim Virkler; ©2009 One of my pastimes is personal family genealogical research. I enjoy pinpointing family events and connecting them with people and dates in history. Which family life…
By: Jim Virkler; ©2009 “Pulsing through our classroom walls and through your bodies at this very moment are hundreds of different forms of electromagnetic radiation! How are you feeling as…