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Question

Each square metre of sun’s surface radiates energy at the rate of 6.27×107 Wm2. Assuming that Stefan’s law applies to the radiation, the temperature of sun’s surface is (Stefan’s constant σ=5.7×107 Wm2K4)


A

(1.1×1015)K

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B

(1.1×1015)12K

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C

(1.1×1015)13K

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D

(1.1×1015)14K

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Solution

The correct option is D

(1.1×1015)14K


From Stefan’s law Q=σT4

T=(Qσ)14=(6.27×1075.7×108)14=(1.1×1015)14K

Hence the correct choice is (d).


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