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Introductory Physics Homework Help
Why do we need to equate the rate of energy of the second plate to zero?
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[QUOTE="LCSphysicist, post: 6419506, member: 675151"] [B]Homework Statement:[/B] Print below [B]Relevant Equations:[/B] \n [ATTACH type="full" alt="1605881791524.png"]272828[/ATTACH] [ATTACH type="full" alt="1605881805475.png"]272829[/ATTACH] First i computed the rate of energy wrt time of the second plate: $$dq_{2}/dt = A \sigma ((373)^4/2 + (273)^4/2 - T_{2}^4)$$ Equaliting it to zero we get the answer. But i am not sure why do we need to equality it to zero. The q arrow on the figure suggest me that it is conservation of energy (radiation flux), but i don't get why. The black body has transmission coefficient ##\tau = 0##, so i don't understand why the flux of radiation need to be equal. The body could pretty well absorb the energy coming from 1 and emite an energy to 3 totally different, couldn't? [/QUOTE]
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Introductory Physics Homework Help
Why do we need to equate the rate of energy of the second plate to zero?
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