A small telescope has an objective of focal length 140 cm and an eye piece of focal length 5.0 cm . The…
A small telescope has an objective of focal length 140 cm and an eye piece of focal length 5.0 cm . The magnifying power of telescope for viewing a distant object is:
28
17
32
34
Solution
$f_0=140 \mathrm{~cm}$ and $f_e=5 \mathrm{~cm}$
For distant object,
$m=\frac{f_0}{f_e}=\frac{140}{5}=28$