Two spherical bodies of same materials having radii 0.2 m and 0.8 m are placed in same atmosphere. The temperature of the smaller body is 800 K and temperature of the bigger body is 400 K . If the ene

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Two spherical bodies of same materials having radii 0.2 m and 0.8 m are placed in same atmosphere. The temperature of the smaller body is 800 K and temperature of the bigger body is 400 K . If the energy radiated from the smaller body is E, the energy radiated from the bigger body is (assume, effect of the surrounding temperature to be negligible),

TestHub · Accepted Answer

​ dt d θ ​ = σ eAT 4 ⇒ P ∝ AT 4 P larger ​ P smaller ​ ​ = ( 0.8 ) 2 × 40 0 4 ( 0.2 ) 2 × 80 0 4 ​ 16 1 ​ × 16 = 1 ∴ P larger ​ = P smaller ​ ​

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