MHT CET 2026 Physics question
A black rectangular surface of area A emits energy E per second at 127 C. If length and breadth is reduced to half of initial value and temperature is raised to 527C then energy emitted becomes
Answer: (C)
Solution
By Stefan's law the energy emitted per second is . Initial temperature K and final K, so . Halving both length and breadth makes the new area $A' =
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