Answer:
Green part of the visible spectrum.
X ray part of the electromagnetic spectrum.
Infrared part of the electromagnetic spectrum.
Explanation:
Wien's displacement law
![\lambda_{max}=\frac{b}{T}](https://tex.z-dn.net/?f=%5Clambda_%7Bmax%7D%3D%5Cfrac%7Bb%7D%7BT%7D)
Where, b = Wien's displacement constant = 2.898×10⁻³ mK
T = Temperature in kelvin
![\lambda_{max}=\frac{2.898\times 10^{-3}}{5800}\\\Rightarrow\lambda_{max}=0.499\times 10^{-6}=0.5\mu m=500\ nm](https://tex.z-dn.net/?f=%5Clambda_%7Bmax%7D%3D%5Cfrac%7B2.898%5Ctimes%2010%5E%7B-3%7D%7D%7B5800%7D%5C%5C%5CRightarrow%5Clambda_%7Bmax%7D%3D0.499%5Ctimes%2010%5E%7B-6%7D%3D0.5%5Cmu%20m%3D500%5C%20nm)
So, the wavelength would be of around the green part of the visible spectrum.
![\lambda_{max}=\frac{2.898\times 10^{-3}}{1\times 10^6}\\\Rightarrow\lambda_{max}=2.898\times 10^{-9}=2.898\ nm](https://tex.z-dn.net/?f=%5Clambda_%7Bmax%7D%3D%5Cfrac%7B2.898%5Ctimes%2010%5E%7B-3%7D%7D%7B1%5Ctimes%2010%5E6%7D%5C%5C%5CRightarrow%5Clambda_%7Bmax%7D%3D2.898%5Ctimes%2010%5E%7B-9%7D%3D2.898%5C%20nm)
So, the wavelength would be of around the X ray part of the electromagnetic spectrum.
Human body temperature = 37°C = 37+273.15 = 310.15 K
![\lambda_{max}=\frac{2.898\times 10^{-3}}{37+273.15}\\\Rightarrow\lambda_{max}=\frac{2.898\times 10^{-3}}{310.15}\\\Rightarrow\lambda_{max}=9.34\times 10^{-6}=934\ nm](https://tex.z-dn.net/?f=%5Clambda_%7Bmax%7D%3D%5Cfrac%7B2.898%5Ctimes%2010%5E%7B-3%7D%7D%7B37%2B273.15%7D%5C%5C%5CRightarrow%5Clambda_%7Bmax%7D%3D%5Cfrac%7B2.898%5Ctimes%2010%5E%7B-3%7D%7D%7B310.15%7D%5C%5C%5CRightarrow%5Clambda_%7Bmax%7D%3D9.34%5Ctimes%2010%5E%7B-6%7D%3D934%5C%20nm)
So, the wavelength would be of around the Infrared part of the electromagnetic spectrum.