Question:
The focal length of objective lens of astronomical telescope
Last updated: 6/25/2023
![The focal length of objective lens of astronomical telescope](https://media.kunduz.com/media/sug-question-candidate/20210708075153762213-3507747.jpg?h=512)
The focal length of objective lens of astronomical telescope is 50 cm and tube length is 55 cm when final image is obtained at infinity The angular magnification of telescope will be O 11 O 10 O45 60