Which colours do you observe when an iron rod is gradually heated ?

Explanation

Yes. we find some changes of in colours while heading rod .When we heat an iron rod, some amount of heal energy that was absorbed by iron rod is emitted as light. First, iron turns into red (lower energy corresponding to higher wavelength) and as the temperature rises it glows and turns into orange, yellow 'b]ue' respectively (higher energy and oflower wavelength). If we go on heating the rod it turns into white light which includes all Visible wavelengths.