In a telescope the object glass of focal length 14 cm, is located at 20 cm from the diaphragm. The focussing lens is midway between them when a staff 16.50 m away is focussed. The focal length of the focussing lens, is« Back to Previous Page

7.24 cm Posted by Civil Engineer Asked on June 17, 2016 3:32 pm

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7.24 cm Posted by Civil Engineer Answered on June 25, 2016 3:29 pm