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JIPMER 2012
Exam
JIPMER
Year
2012
Subject
Physics
Chapter
Thermal Properties of Matter

JIPMER 2012 · Physics · Thermal Properties of Matter

The surface temperature of the sun which has maximum energy...

The surface temperature of the sun which has maximum energy emission at 500 nm is 6000 K . The temperature of a star which has maximum energy emission at 400 nm will be

Options

  1. A8500 K
  2. B4500 K
  3. C7500 K
  4. D6500 K

Correct answer

C. 7500 K

Step-by-step solution

By using Wien's displacement law, (λm)1T1=(λm)2T2⇒500×6000=400×T2⇒T2=500×6000400T2=7500 K\left(\lambda_m\right)_1 T_1=\left(\lambda_m\right)_2 T_2 \Rightarrow \quad 500 \times 6000=400 \times T_2 \Rightarrow \quad T_2=\frac{500 \times 6000}{400} T_2=7500 \mathrm{~K}
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