What was utilized around the light source to enhance the signal? – McqOptions

MCQOPTIONS

1.	What was utilized around the light source to enhance the signal?
A.	Photodiodes
B.	Optical Shied
C.	Ceramic Substrate
D.	Red and infrared LED‚Äö√Ñ√∂‚àö√ë‚àö¬•s
Answer» B. Optical Shied

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