The microwave energy will absolutely heat the eyes, and everything else in there, regardless of moisture. The dielectric materials will heat quickly as they offer resistance to the RF.
You must be thinking of humans, as human eyes will generally heat quicker when a body is exposed to RF. The rest of the human body will heat as well, but the eyes may melt first, while electricity arcs between the fillings on their teeth.
There are a lot of assumptions here. The specific frequency of the microwave oven is tuned to be absorbed by water molecules.
Yes other materials, particularly metals, (shape and size matter too) can absorb the RF energy as well, but a lot do not, and the RF passes harmlessly through them.
Just like the massive amounts of RF that is going through you right now, every second of everyday. It is everywhere, but the wavelength is something that ignores almost everything you are made of.
There are assumptions for sure, as to the materials of the sloth, and how it interacts with the microwave energy. Will the eyes heat? Probably. Will they heat before the rest of the plushy erupts into flames? Not sure, but it’a testable, just not in my microwave.
There are many sections of the electromagnetic spectrum, but we are dealing with microwave energy in a microwave. Communication signals bouncing off the ionosphere and RF generated by car ignitions doesn’t seem relevent to the discussion.
The RF, as electromagnetic energy, will induce current in metal objects that cut across the path of propagation. Yes, size, shape, material are important, which is why the plushie doesn’t immediately catch fire.
If you allow microwave frequencies to cut across a human body with sufficient output power, you will heat that body and cook them with similar effects as food in a microwave.
Not sure, but it’a testable, just not in my microwave.
If the instructions say to microwave the thing whole, then it was presumably tested in the manufacturer’s microwave, though
