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A reflecting telescope has a large mirro...

A reflecting telescope has a large mirror for its objective with radius of curvature equal to `80 cm`. The magnifying power of this telescope if eye piece used has a focal length of `1.6 cm` is

Text Solution

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Given R=80cm
`therefore f_(0)=80/2=40cm`
`f_(e)=1.6cm`
`therefore M=f_(0)/f_(e) =40/1.6=25`
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