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Solution


Q.

A small telescope has an objective of focal length 140 cm and an eye piece of focal length 5.0 cm. The magnifying power of telescope for viewing a distant object is    [2024]
1 34  
2 28  
3 17  
4 32  

Ans.

(2)

Given, f0=140cm  and  fe=5.0cm

Magnifying power of a telescope, M=f0fe  ∴  M=1405.0=28