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A Galilean telescope of 10-fold magnifi...

A Galilean telescope of `10`-fold magnification has the length of `45 cm` when adjusted to infinity. Determine :
(a) the focal lengths of the telescope's objective and ocular,
(b) by what distance the ocualr should be displaced to adjust the telescope to the distance of `50 m.`

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The correct Answer is:
(a) 50 cm, 5 cm, (b) `0.5`cm
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