Two convex lenses of focal length 0. 2m and 0. 05 m are used to make a telescope the distance kept between them is equal to?

1 Answer
Narad T.
Jul 17, 2018

The distance is #=0.25m#

Explanation:

The distance between the objective and the eyepiece is equal to the sum of their fical lengths.

#d=f_o +f_e#

The focal length of objective is #f_o=0.2m#

The focal length of eyepiece is #f_o=0.05m#

The distance is

#d=0.2+0.05=0.25m#

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