In a simple astronomical telescope, the objective and the eyepiece used respectively, are:
- A. a convergent lens and a divergent lens.
- B. a divergent lens and a divergent lens.
- C. a divergent lens and a convergent lens.
- D. a convergent lens and a convergent lens. ✓
Correct Answer: D. a convergent lens and a convergent lens.
Explanation
A standard refracting astronomical telescope uses two convex (convergent) lenses: an objective lens of large focal length and an eyepiece of short focal length.
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