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MHT CET 2023 (10 May, Shift 1) · Thermal Radiation: Black Body, Stefan & Wien

Thermal Radiation: Black Body, Stefan & Wien question from MHT CET 2023 (10 May, Shift 1)

Q72MHT CET 2023 · 10 MAY · SHIFT 1Easy

Thermal Radiation: Black Body, Stefan & Wien

Heat energy is incident on the surface at the rate of X J/min. If ' $a$ ' and ' $r$ ' represent coefficient of absorption and reflection respectively then the heat energy transmitted by the surface in ' $t$ ' minutes is

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Answer: (a)

$a + r + t = 1 \Rightarrow t = 1 - (a+r)$
Energy incident in $t$ minutes $= Xt$
Transmitted $= [1-(a+r)]Xt$
None of the options matches exactly; (a) $(a+r)Xt$ is the energy absorbed plus reflected, not transmitted.

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