Physics · Heat Transfer
Two infinitely large parallel plates (I and II) are held at temperatures TI and TII (TI > TII) respectively and placed at a distance 2d apart in a vacuum. An infinitely large flat radiation shield (III) is placed in parallel in between I and II. If the emissivities of all the plates are equal, the ratio of the steady-state radiative heat fluxes with and without the shield is:
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