Let us think about electromagnetic wave.

very high temperature-----> UV emission

high temperature-----------> visible light emission

room temperature ---------> IR emission

low temperature------------>micro wave emission??

If not, what is the problem?

Edited February 6, 201114 yr by alpha2cen

Everything that you see around you is emitting microwaves.

Even hot things, as well as emitting light, give of microwaves; in fact they give off more than cool things do.

Use Wien's displacement law to calculate the temperature that corresponds to the peak wavelength in the microwave band of a blackbody. Let us know what temperature you get.

Then, Do at the more low temperature objects emit radio waves, too?

According to Wien's displacement law, we correct above statement.

Edited February 6, 201114 yr by alpha2cen

Then, Do at the more low temperature objects emit radio waves, too?

 

all black(even gall grey) body emitters emit at all wavelengths. the temperature only affects the proportion.