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Define the following : (a) Principal axi...

Define the following : (a) Principal axis,
(b) Focal ength, ( c ) Pole (d) Centre of curvature.

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Step by step text solution for Define the following : (a) Principal axis, (b) Focal ength, ( c ) Pole (d) Centre of curvature. by PHYSICS experts to help you in doubts & scoring excellent marks in Class 8 exams.

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