Question

Normal human body temperature is about 37°C. What is this temperature in kelvins? What is the peak wavelength emitted by a person with this temperature? In what part of the spectrum does this lie?

Answer 1

Answer:

9318.07190069 nm

infrared

Explanation:

b = Wien's displacement constant = $2.89\times 10^{-3}\ mK$

T = Temperature = 37+273.15 K

From Wien's displacement law we have

$\lambda=\dfrac{b}{T}\\\Rightarrow \lambda=\dfrac{2.89\times 10^{-3}}{37+273.15}\\\Rightarrow \lambda=0.00000931807190069\ m=9318.07190069\ nm$

The wavelength is 9318.07190069 nm

This wavelength lies in the infrared spectrum (700 nm-1 mm)