By heating a iron part with flame, first it becomes red, then reddish yellow and at last white. Which can give correct explanation from following ?

By heating a iron part with flame, first it becomes red, then reddish

1.	By heating a iron part with flame, first it becomes red, then reddish yellow and at last white. Which can give correct explanation from following ?
Answer» NEWTON's law of COOLING Stefan's law Wien's displacement law Kirchoff's law Solution :`lamdaprop1/T` where, T = TEMPERATURE