Comment by cwillu
10 hours ago
The feature size of the matte vs shiny sides are much smaller than the wavelength of the bulk of the radiated light in either a microwave or conventional oven.
10 hours ago
The feature size of the matte vs shiny sides are much smaller than the wavelength of the bulk of the radiated light in either a microwave or conventional oven.
> microwave or conventional oven
I worry for you if you're microwaving aluminum foil.
Is it? I can see the broiler glowing, so at least a decent chunk is close to visible light.
Look up the emission spectrum for a body at the temperature of a typical oven element: yes, it starts emitting some light that is visible, but the bulk of the energy is still in the IR band.