At what wavelength does the human body emit the maximum electromagnetic radiation? Use Wien's law from Exercise 14 and assume a skin temperature of
The wavelength corresponds to the maximum electromagnetic radiation emitted by the human body is .
Wein's law can be expressed in terms of temperature (T) and maximum wavelength ( ) such that,
Convert the Fahrenheit temperature to Kelvin, such that
Using Wein's law
The wavelength which corresponds to the maximum electromagnetic radiation emitted by the human body is .
In positron emission tomography (PET), discussed in progress and Applications, an electron and positron annihilate, and two photons of characteristic energy are detected. What is this energy and what is the corresponding wavelength? The pair can be assumed to be essentially stationary before annihilation.
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