Answer
a. $\lambda_p =1.1\times10^{-5}m$, infrared
b. $\lambda_p =9.4\times10^{-7}m$, infrared
c. $\lambda_p =7.3\times10^{-4}m$, microwave
Work Step by Step
Use Wien’s law, equation 27–2.
$$\lambda_p =\frac{2.90\times10^{-3}m \cdot K}{T}$$
a. $\lambda_p =\frac{2.90\times10^{-3}m \cdot K}{273K}=1.1\times10^{-5}m$, infrared radiation.
b. $\lambda_p =\frac{2.90\times10^{-3}m \cdot K}{3100K}=9.4\times10^{-7}m$, infrared radiation.
c. $\lambda_p =\frac{2.90\times10^{-3}m \cdot K}{4K}=7.3\times10^{-4}m$, microwave.
