MHT CET 2026 Physics question
A black rectangular surface of area A emits energy E per unit time at 27 C. If length and breadth is reduced to of initial value and temperature is raised to 327C, then energy emitted per unit time becomes
Answer: (A)
Solution
By Stefan's law, energy emitted per unit time for a black body. Initially K and area . Reducing both length and breadth to reduces the area to . The new temperature is K . Then
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