If temperature of a black body increases from 300 K to 900 K , then the rate of energy radiation increases by

Step-by-step solution

According to Stefan's law ρ = E t = σ A e T 4 So, we can write as E 2 E 1 = T 2 T 1 4 E 2 E 1 = 900 300 4 ⇒ E 2 E 1 = 3 4 E 2 = 81 E 1    ⇒ E 2 E 1 = 81