When a telescope is adjusted for parallel light, the distance of the objective from the eye piece is found to be `80 cm`. The magnifying power of the telescope is 19 . The focal length of the lenses areA. 61 cm , 19 cmB. 40 cm , 40 cmC. 76 cm , 4 cmD. 50 cm , 30 cm

When a telescope is adjusted for parallel light, the distance of the o

1.	When a telescope is adjusted for parallel light, the distance of the objective from the eye piece is found to be `80 cm`. The magnifying power of the telescope is 19 . The focal length of the lenses areA. 61 cm , 19 cmB. 40 cm , 40 cmC. 76 cm , 4 cmD. 50 cm , 30 cm
Answer» Correct Answer - c

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When a telescope is adjusted for parallel light, the distance of the objective from the eye piece is found to be `80 cm`. The magnifying power of the telescope is 19 . The focal length of the lenses areA. 61 cm , 19 cmB. 40 cm , 40 cmC. 76 cm , 4 cmD. 50 cm , 30 cm

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