The Total solution for NCERT class 6-12
A small telescope has anobjective lens of focal length 140 cm and an eyepiece of focal length 5.0 cm.What is the magnifying power of the telescope for viewing distant objects when
(a) the telescope is in normaladjustment (i.e., when the final image
is at infinity)?
(b) the final image isformed at the least distance of distinct vision
(25cm)?
Focal length of the objective lens,= 140 cm
Focal length of the eyepiece, fe = 5 cm
Least distance of distinct vision, d =25 cm
(a) When the telescopeis in normal adjustment, its magnifying power is given as:
(b) When the final image isformed at d,the magnifying power of the telescope is given as: