In a laboratory four convex lenses `L_(1), L_(2), L_(3)` and `L_(4)` of focal lengths `2,4,6` and `8 cm` respectively are available. Two of these lenses form a telescope of length `10 cm` and magnifying power 4 . The objective and eye lenses are

Options

A. `L_(2),L_(3)`
B. `L_(1),L_(4)`
C. `L_(3),L_(2)`
D. `L_(4),L_(1)`

Answer

D

Explanation

To make telescope of higher magnifying power, `f_(o)` should be large `f_(e)` should be least.