The reflected light from the skin at wavelengths of 665nm(red) and 935 – McqOptions

MCQOPTIONS

1.	The reflected light from the skin at wavelengths of 665nm(red) and 935nm(infrared) is detected by _____________?
A.	Photo diode
B.	Laser diode
C.	Silicon diode
D.	Zener diode
Answer» D. Zener diode

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