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)┬аthe telescope is in normaladjustment (i.e., when the final image
is at infinity)?
(b)┬аthe final image isformed at the least distance of distinct vision
(25cm)?
Focal length of the objective lens,= 140 cm
Focal length of the eyepiece,┬аfe┬а= 5 cm
Least distance of distinct vision,┬аd┬а=25 cm
(a)┬аWhen the telescopeis in normal adjustment, its magnifying power is given as:
(b)┬аWhen the final image isformed at┬аd,the magnifying power of the telescope is given as: