Question

How would the magnification of a telescope be affected by increasing the
focal length of:
(a) the objective _____________________________________________
______________________________________________________
(b) the eye piece _____________________________________________
________________________________________________________

Answer 1

Dear Student,

◆ Magnification of a telescope -

Magnification of telescope is calculated as the ratio of focal length of objective lens to focal length of eyepiece.

Magnification = focal length of objective / focal length of eyepiece

1. When focal length of objective is increased, magnification of a telescope will increase.
2. When focal length of eyepiece is increased, magnification of a telescope will decrease.

Thanks dear. Hope this helps you...