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Focal length of objective eyepiece and inverting lens of terrestrial telescope for 20 CM 10 cm and 5 cm respectively. Length of tube containing these lenses at normal adjustment is (1)30cm (2)35cm (3)50cm (4)40cm

Answer» Focal length of objective eyepiece and inverting lens of terrestrial telescope for 20 CM 10 cm and 5 cm respectively. Length of tube containing these lenses at normal adjustment is
(1)30cm (2)35cm (3)50cm (4)40cm


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