All lens have positive focal power.$ – McqOptions

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1.	All lens have positive focal power.$
A.	True
B.	False
Answer» C.

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All lens have positive focal power.
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CONVEX_LENS_HAS_NEGATIVE_FOCAL_POWER_AND_CONCAVE_LENS_HAVE_POSITIVE_FOCAL_POWER.?$
All lens have positive focal power.$
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