The magnifying power $M$ of a telescope for a distant object is given by the formula:
$M = \frac{f_o}{f_e}$,
where:
- $f_o = 140 \, \text{cm}$ is the focal length of the objective lens.
- $f_e = 5.0 \, \text{cm}$ is the focal length of the eyepiece.
Substituting the values:
$M = \frac{140}{5.0} = 28$.
Thus, the magnifying power of the telescope is 28.
List I | List II | ||
---|---|---|---|
A | Mesozoic Era | I | Lower invertebrates |
B | Proterozoic Era | II | Fish & Amphibia |
C | Cenozoic Era | III | Birds & Reptiles |
D | Paleozoic Era | IV | Mammals |