Q181 / 225 · JEE Main 2004 · Physics

If the temperature of the sun were to increase from $T$ to $2 T$ and its radius from $R$ to $2 R$, then the ratio of the radiant energy received on earth to what it was previously will be

  • A
    4
  • B
    16
  • C
    32
  • Correct answer
    D
    64

Solution

According to stefan's law, $P \propto A T^4$ and $A \propto r^2$ $P \propto r^2 T^4$

Hence, the correct answer is option: 'D'.

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