MCQ
An astronomical telescope has an angular magnification of magnitude $5$ for distant objects. The separation between the objective and the eye piece is $36 \mathrm{~cm}$ and the final image is formed at infinity. The focal length $f$ of the objective and the focal length $f$ of the eye piece are
- A$f=45 \mathrm{~cm}$ and $f=-9 \mathrm{~cm}$
- B$f=7.2 \mathrm{~cm}$ and $f=5 \mathrm{~cm}$
- C$f=50 \mathrm{~cm}$ and $f=10 \mathrm{~cm}$
- ✓$f=30 \mathrm{~cm}$ and $f=6 \mathrm{~cm}$
