For an atherminous substance with a, r and t being coefficient of absorption, reflection and transmission respectively. If a = 0.3. Which of the following is correct?
t= 0.35 and r= 0.35
r = 0.7
t = 0.7
a = 0 for atherminouse so a can't be 0.3
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We haave
a+r+t=1
where
a=Coefficient of absorption
r=0.22=Coefficient of radiation
t=0.04=Coefficient of transmission
a+0.22+0.04=1
a=0.74
Now,
Qa=aQ=0.74×250=185 J
Therefore radiant heat absorbed is 185 J
Explanation:
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