As the the title suggests, how is it that a little light they put on our finger when at the doctors/hospital/etc.. is able to tell us our blood oxygen levels?
In: 334
As a Google Product Expert I can answer this.
There are 2 colers of LED’s the Red and Infrared
The amount of Oxygen in the blood affects the absorbtion rate of these two colors.
Since the amount of.. Since the distance also affects the absorbtion rate, most sensor use both colors.
I forget which way the absorption is, I think ocygenated blood absorbs infrared, while deoxonated blood absorbs more red
Latest Answers