Optical sensors used for the displacement measurement works on the pr – McqOptions

MCQOPTIONS

1.	Optical sensors used for the displacement measurement works on the principal that
A.	Intensity of light increases with distance
B.	Intensity of light decreases with distance
C.	Intensity of light remains constant with distance
D.	Intensity of light increases with time
Answer» C. Intensity of light remains constant with distance

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