What would be the wavelength of maximum emission of interstellar dust grains at a temperature of 65 K? (See Wien's law, Section 5-4, Universe, 11th ed.)

Question

Quizplus · Accepted Answer

According to Wien's law, the wavelength of maximum emission (λmax) is inversely proportional to the temperature (T). λmax = (2.898 x 10^-3 mK) / T. Converting 65 K to Kelvin, we get T = 338 K. Plugging this into the equation, we get λmax = (2.898 x 10^-3 mK) / (338 K) = 8.57 x 10^-6 m or 45 μm (since 1 micron = 10^-6 meters). Therefore, the correct answer is C.

What Would Be the Wavelength of Maximum Emission of Interstellar