An internal focussing type surveying telescope, may be focussed by the movement of« Back to Previous Page

A. objective glass of the telescope B. convex-lens in the telescope C. concave lens in the telescope D. plano-convex lens in the telescope. Posted by Civil Engineer Asked on August 5, 2016 11:45 am

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C. concave lens in the telescope Posted by Civil Engineer Answered on August 5, 2016 11:46 am