CBSE Class 10 Answered
is linear aperture a straight line?also explain principal section
Asked by neelsid | 28 May, 2009, 06:40: PM
Expert Answer
A principal axis is a line that passes through the center of curvature of a lens
so that light is neither reflected nor refracted.
Answered by | 29 May, 2009, 12:37: AM
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