The value of angular magnification if the final image is formed at near point, instead of infinity is .

Q.

What will the value of angular magnification be if the final image is formed at near point, instead of infinity?

Q. Show that, if you place the object so that the image is at your near point instead of at infinity, the angular magnification is increased to the value
$\alpha =\frac{d}{f}+1$

Q. The magnification produced by an astronomical telescope when the final image is formed at infinity is $10$ and the length of the telescope is $1.1\text{m}$. The magnification when the final image is formed at least distance of distinct vision is -

Q. The angular magnification of astronomical telescope of distant object is 5. If the distance between objective and eye piece is 36 cm and the final image is formed at infinity then the focal length of its objective and eye piece will be

Q. An astronomical telescope has an angular magnification of magnitude $5$ for distant objects.The separation between the objective and the eyepiece is $36cm$. The final image is formed at infinity. The focal lengths of the objective and the eyepiece are respectively: