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GR0177 #63
Problem
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Statistical Mechanics$\Rightarrow$}Wien Law

Recall Wien's Law, $\lambda T = 2.9 E-3$. It relates the temperature with the wavelength at maximal intensity. The wavelength at the maximal intensity is approximately $2\mu m$. Plugging this in, one finds that $T = 2.9E-3/2E-6 \approx 1500K$, as in choice (D).

Alternate Solutions
 UNKNOWNUMBER2018-10-19 02:26:37 Just approximate the constant as 3. Knowing Wien\'s law, you get 3/2=1.5. The answer has to be VERY close to that number times some power of 10, so you can quickly zone in on (D).Reply to this comment Ning Bao2008-02-01 07:16:07 Dimensional analysis: you get m*K and K and m and are asked to solve for K.Reply to this comment
 UNKNOWNUMBER2018-10-19 02:26:37 Just approximate the constant as 3. Knowing Wien\'s law, you get 3/2=1.5. The answer has to be VERY close to that number times some power of 10, so you can quickly zone in on (D).Reply to this comment Ning Bao2008-02-01 07:16:07 Dimensional analysis: you get m*K and K and m and are asked to solve for K.Reply to this comment

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