Define resolving power of an astronomical refracting telescope and write expression for it in normal adjustment.Assume that light of wave length 6000Å is coming from a star, what is the limit of resolution of a telescope whose objective has a diameter of 2.54m?

Explanation

### Step-by-Step Solution:

1. **Define Resolving Power:**
The resolving power of an astronomical refracting telescope is defined as its ability to distinguish between two closely spaced objects. It is the measure of the telescope's capability to form separate images of two neighboring objects. A higher resolving power indicates a better ability to distinguish between these objects.

2. **Expression for Resolving Power in Normal Adjustment:**
The expression for the resolving power (R) of a telescope in normal adjustment is given by:
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