Questions
The magnifying power of an astronomical telescope is 8 and the distance between the two lenses is 54 cm. The focal length of eye lens and objective lens will be respectively
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a
6 cm and 48 cm
b
48 cm and 6 cm
c
8 cm and 64 cm
d
64 cm and 8 cm
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Correct option is A
fo+fe=54 and fofe=m=8⇒fo=8fe⇒8fe+fe=54⇒fe=549=6⇒fo=8fe=8×6=48Similar Questions
Telescopes have larger diameter of objective
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