Actually, a convection oven is a little more sophisticated than a regular oven. I think that it’s designed in such a way as to facilitate the movement of hot air inside the oven, and hence to heat food via convection rather than radiation. They’re rather faster than a conventional radiative oven for most tasks, but I don’t have much experience with them.
As for more details on the arcs: They were definitely inside the cavity of the oven, and I presume went from one wall to another (although I didn’t have a very clear view of them). I didn’t measure the UV produced, of course, but they were rather bluish. And each one was accompianied by a popping or zapping sound. Yeah, that’s probably not very helpful, but that’s about all the detail I was able to observe.
Correct. At the very least, I’ve seen several CDs which have undergone trial in its bowels, and there are unexplaned scorch marks on the ceiling of the chamber, burnt completely through the plastic liner in places. As of when I got here, nobody was even sure which prior tenant of the office had brought it in, or when, so who knows what else it’s been through before.
Bolding in original. So when I said a regular oven is a convection oven, I was not completely wrong. In general, an oven is used for baking. Broiling in an oven is less frequent - grills are more popular for that. And baking is cooking with hot air - which is convection. However, a “convection oven” may be something more specific than a conventional oven, with circulating air.