Using Wien's law, what is the approximate peak wavelength of radiation emitted by (live) human beings, who are (normally) at a temperature of about 310 K (1 μm = 10^-6 m)? A)9.4 μm B)3.1 μm C)94 μm D)0.94 μm

Question

Quizplus · Accepted Answer

Wien's displacement law states that the peak wavelength of radiation ($\lambda_{max}$) emitted by a black body is inversely proportional to its temperature (T), given by $\lambda_{max} = \frac{b}{T}$, where $b$ is Wien's displacement constant ($2.898 \times 10^{-3} m \cdot K$). For a human body at 310 K, $\lambda_{max} = \frac{2.898 \times 10^{-3}}{310} \approx 9.35 \times 10^{-6} m$ or approximately 9.4 μm.

Using Wien's Law, What Is the Approximate Peak Wavelength of Radiation