Microwave Action and Color
In a microwave oven does a black colored cup heat faster
than a blue or red cup?
Why not try this and report back on the results, and, if there is a heating
difference, try to explain the cause(s)?
Thanks for using NEWTON!
Color as we see it relates to light with frequencies in the visible range.
Something that absorbs all visible light may reflect almost all microwave
light. It depends on things like the material that the surface is made of.
Since our eyes only respond to visible light, color as we see it tells us
nothing about what happens to microwaves.
If you know whether a particular object reflects or absorbs microwaves well,
then you can make a prediction. Material that absorbs the microwaves well
heats up much more quickly than material that reflects microwaves well.
No. The microwave energy is absorbed primarily by the water. The cup has
very little to do with it. Even if the cup did impact the heating it would
not be through its color. The color is determined by the absorption of
visible light. The microwave energy is -- well it's microwave, not visible.
All cups made of the same material will have the same microwave absorption
characteristics. The color of the glaze will have no impact.
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Update: June 2012