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I`m unable to understand the question. Please give me solution with explanation

I`m unable to understand the question. Please give me solution with explanation

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Grade:11

1 Answers

Arun
25750 Points
6 years ago
Dear Preeti 
 
Use 
E = \sigma T4
T is in kelvin
When you put this
You get
E = \sigma (400)4
And 
E2 = \sigma (600)4
Hence
E2/E = 1296/256
E2 = 81E/16
Hence option 2 is correct.

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