1.THATS kinda more observed question..
well I think microwave the material is baked by passing microwave radiations. which then makes the cake fluffy. which is not like normal heating apparatus, I believe the baking dish do have certain rise in temperature,but not more as the waves are conducted it is not like normal heating which will be then conducted..
2. also it depends on the material too I mean plastic will melt but glass won't.. one has to experimentally observe and perform in order to have a full understanding of this question
