The coefficient of absorption (a) and the coe | vedclass

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Question

(C) For any surface,the sum of the coefficient of absorption $(a)$,the coefficient of reflection $(r)$,and the coefficient of transmission $(t)$ is eq

Vedclass · Accepted Answer

$15$

Vedclass · Answer

(C) For any surface,the sum of the coefficient of absorption $(a)$,the coefficient of reflection $(r)$,and the coefficient of transmission $(t)$ is equal to $1$. $a + r + t = 1$ Given: $a = 0.77$,$r = 0.17$. Substituting these values: $0.77 + 0.17 + t = 1$ $0.94 + t = 1$ $t = 1 - 0.94 = 0.06$ The quantity of heat transmitted is given by the product of the incident heat $(Q)$ and the coefficient of transmission $(t)$. $Q_{	ext{transmitted}} = Q 	imes t$ $Q_{	ext{transmitted}} = 250 \ kcal 	imes 0.06$ $Q_{	ext{transmitted}} = 15 \ kcal$ Therefore,the correct option is $C$.

The coefficient of absorption $(a)$ and the coefficient of reflection $(r)$ of a thin uniform plate are $0.77$ and $0.17$ respectively. If $250 \ kcal$ of heat is incident on the surface of the plate,the quantity of heat transmitted $(t)$ is: (in $kcal$)

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