[" 4.Two uniform solid spheres "A" and "B" of same "],[" material,painted completely black and placed "],[" in free space separately where no radiation is "],[" incident on spheres.Their radii are "R" and "2R],[" respectively and the dominating wavelengths "],[" (wavelength corresponding to which spectral "],[" (1) Ratio of their temperatures is "2:1],[" (2) Ratio of their emissive powers is "4:1],[" (3) Ratio of their rates of heat loss is "4:1],[" (4) Ratio of their rates of cooling is "32:1],[" (4) Ratio of their rates of cooling is "32:1]