Heat TransferMedium
Question
A red star and a green star radiate energy at the same rate which star is bigger .
Options
A.Red
B.Green
C.Both have same sixeBoth have same size
D.can’t be say anything
Solution
= σAT4 = same but Tred < Tgreen as λred < Tred = λgreenTgreen (see VIBGYOR)⇒ Area of red star is greater
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