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Mosquitoes are able to find a person’s vein in three stages; at a range of 50...

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Physics

Mosquitoes are able to find a person’s vein in three stages; ata range of 50 meters the mosquito detects a CO2 plume due tobreath, at 10 meters the mosquito is able to see the person in thevisible range, and finally inside 20 cm the mosquito can detect thelow energy light emitted from our warm veins. If the average bodytemperature is 37.5 ◦ C and the mosquitoes eye is sensitive enoughto detect 10^16 photons per second in the infrared, estimate thesurface area of the mosquitoes eye (in mm^2 ). Hint: consider themosquito at 20 cm from a person’s arm and approximate the arm as acylinder with a surface area of 4.5% where all radiation leavesperpendicular to the surface the total. You will need: • theaverage length of a person’s arm ≈ 64 cm. • the average surfacearea of a person ≈ 1.75 m^2 .

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4.3 Ratings (524 Votes)
From Weins displacement law the wavelength of the radiationemitted will befor this wavelength the energy of the photon isthis is    See Answer
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