Question

When we heat on iron bar it first becomes red and then orange and finally begins to glow with white light and tgen blue .Explain why?​

Answer 1

Explanation:

when we heat an iron rod first the heat energy is given to the iron rod

the red colour has the highest wavelength

we know that wavelength is inversely proportional to energy red has the lease energy

an on further heating the energy transferred to the iron rod increases and it changes its colour in the increasing order of energy from red to violet

finally all colours come at a high energy and we know that the micxture of all the visible spectrum(vibgyor) is white light .

hence at last to glow with white