Heat and Thermal ExpansionHard

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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