The e-missive power of a black body is P. If its absolute

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The e-missive power of a black body is P. If its absolute temperature is doubled, the e-missive power becomes

1. 2P
2. 4P
3. 8P
4. 16P

Correct Option: D

E_b = σ T⁴

	E₂	=	T₂⁴	=		2T		⁴	= 16
	E₁		T₁⁴			T

E_b2 = 16 E_b1
E_b2 = 16 P (∵ E_b1 = P)