Draw a labelled ray diagram of an astronomical telescope in the near point position. Write the expression for its magnifying power.

Explanation

### Step-by-Step Solution

**Step 1: Understanding the Components of an Astronomical Telescope**
- An astronomical telescope consists of two main lenses: the objective lens and the eyepiece lens.
- The objective lens (O) has a long focal length and is used to collect light from distant celestial objects.
- The eyepiece lens (E) has a shorter focal length and is used to magnify the image formed by the objective lens.

**Step 2: Drawing the Ray Diagram**
...