A black body at a high temperature T kelvin radiates energy at the rate of E W/m2. If the temperature falls by 30% (i.e., to 0.7*T kelvin), the radiation energy rate will be a) 0.7*E b) E/0.7 c) 0.24*E d) 4.16*E

A black body at a high temperature T kelvin radiates energy at the rate of E W/m2. If the temperature falls by 30% (i.e., to 0.7T kelvin), the radiation energy rate will be a) 0.7E b) E/0.7 c) 0.24E d) 4.16E

Inquiry into Physics

8th Edition

ISBN:9781337515863

Author:Ostdiek

Publisher:Ostdiek

Chapter8: Electromagnetism And Em Waves

Section: Chapter Questions

Problem 11P

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Concept explainers

Wien's displacement law

Students often get confused between Wien's displacement law and Planck's radiation law. Although both are historically related, yet they are conceptually different. Planck's law helps determine the spectrum of a blackbody, while Wien's law determines the relationship between peak wavelength and temperature.

Question

A black body at a high temperature T kelvin radiates energy at the rate of E W/m². If the temperature falls by 30% (i.e., to 0.7*T kelvin), the radiation energy rate will be

a) 0.7*E

b) E/0.7

c) 0.24*E

d) 4.16*E

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