The focal lengths of the objective and the eye piece of an astronomical telescope are 60 cm and 5 cm respectively. Calculate the magnifying power and the length of the telescope when the final image is formed at (i) infinity, (ii) least distance of distinct vision (25 cm)

Explanation

To solve the problem, we will follow these steps:

### Given Data:
- Focal length of the objective lens (FO) = 60 cm
- Focal length of the eyepiece (FE) = 5 cm
- Least distance of distinct vision (D) = 25 cm

### Part (i): When the final image is formed at infinity
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