Answer: 2:1.
- A 1:2
- B 2:1
- C 1:4
- D 4:1
Correct answer: B. 2:1
Explanation: By Wien law λ_max ∝ 1/T, so ratio = T₂:T₁ = 12000:6000 = 2:1.
During a phase change (melting or boiling), temperature stays constant while heat is absorbed entirely as latent heat (Q=mL); temperature only rises again once the substance is fully in its new phase.
Concept context
Temperature scales, thermal expansion, calorimetry, and the three modes of heat transfer including radiation laws.