Question

In astronomical telescope, the final image is formed at

• A. the least distance of distinct vision
• B. the focus of objective lens
• C. the focus of the eye lens
• D. Infinity

Answer 1

Answer: (D)

Infinity

The above figure is the ray diagram of astronomical telescope. The final image formed is magnified, virtual and inverted with respect to object. The final image is formed at infinity in an astronomical telescope as we can see in the ray diagram.