(a) Draw a labelled diagram of an image of a distant object formed by a refracting astronomical telescope in normal adjustment. Write (do not derive) an expression for its magnifying power.
(b) An aestronomical telescope set for normal adjustment has a magnifying power `10`. If the focal length of the objective is `1.20` m, what is the focal length of the eyepiece ?

Explanation

### Solution:

**(a)** To draw a labeled diagram of an image of a distant object formed by a refracting astronomical telescope in normal adjustment, we follow these steps:

1. **Draw the Objective Lens**: Start by drawing a convex lens (the objective lens) on the left side of the diagram. Label it as "Objective Lens (F₀)".

2. **Draw the Eyepiece Lens**: On the right side of the objective lens, draw another convex lens (the eyepiece lens) and label it as "Eyepiece Lens (Fₑ)".

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