[Solved] The ability of human eye using illuminated area to detect a particle is limited to

Q.	The ability of human eye using illuminated area to detect a particle is limited to
A.	(a) 0.4 micron????????
B.	(b) 25 micron????????
C.	(c) 50 micron????????
D.	(d) 10 micron
Answer» D. (d) 10 micron

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