Physics - Heat & Thermo Question with Solution | TestHub
PhysicsHeat & ThermoHeat TransferMedium2 min
PhysicsMediumsingle choice
A black platinum wire is heated steadily. It first appears dull red, then yellow, then blue-white. This happens because, as the temperature rises:
Options:
Answer:
B
Solution:
By Wien's law , a hotter body has its peak at a shorter wavelength, and by Stefan's law its power rises as . The colour shifts from red towards white. B.
Subject:PhysicsTopic:Heat & ThermoSubtopic:Heat Transfer
⏱ 2m
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