Question

A piece of iron is heated in a flame. It first becomes dull red then becomes reddish yellow and finally turns to white hot. The correct explanation for the above observation is possible by using :

• A. Newton's Law of cooling
• B. Stefan's Law
• C. Wien's displacement Law
• D. Kirchoff's Law

Answer 1

Answer: (C)

Wien's displacement Law

Answer 2

We can explain this observation by using $\lambda_m T = b$ .Which is Wien's displacement law.