If the spectrum of a sunspot shows that it has a maximum intensity at 650 nm,what is the temperature of the sunspot?

Question

Quizplus · Accepted Answer

The temperature of the sunspot can be estimated using Wien's Law, which states that the wavelength of maximum intensity is inversely proportional to the temperature. Using the formula $ T = \frac{b}{\lambda_{max}} $, where $ b \approx 2898 \, \mu m \cdot K $, and $ \lambda_{max} = 650 \, nm = 0.65 \, \mu m $, the temperature $ T \approx 4600 \, K $.

If the Spectrum of a Sunspot Shows That It Has