Q.

Minimum magnifying power of an astronomical telescope is 20. If the focal length of the eyepiece is 5 cm, then distance between the objective and eyepiece is

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a

100 cm

b

95 cm

c

105 cm

d

110 cm

answer is C.

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Detailed Solution

fe=5                               f0=100L=f0+fe=105
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Minimum magnifying power of an astronomical telescope is 20. If the focal length of the eyepiece is 5 cm, then distance between the objective and eyepiece is