28% D Sat 4:23 PM com DQuestion 3 1 pts All objects radiate energy in the form o

Question

28% D Sat 4:23 PM com DQuestion 3 1 pts All objects radiate energy in the form of electromagnetic waves. At our normal body temperature this radiation lies in the infrared. You can makes this radiation visible with an infrared camera. During the Ebola outbreak some airports were using such infrared cameras to screen passengers arriving from countries that struggled with Ebola. Why is it possible to detect if a person has a fever, eveh though the surface temperature is just a few degrees? MacBook A

Explanation / Answer

Here we use Wein’s displacement law,

peakT =2.898*10^-3 m.K

here T=temperature in kelvin

this eqn shows that when temperature changes wavelength radiated from her/his body has unique values. So the person with Ebola will have a different wavelength value which will isolate her/him from other passengers having same normal body temperatures, which will be captured by infrared camera.

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