An astronomical telescope has an eyepiece of focal-length 5cm. If the angular magnification in normal adjustment is 10, when final image is at least distance of distinct vision (25cm) from eye piece, then angular magnification will be :

An astronomical telscope has an eyepiece of focal-length 5 cm. If the angular magnification in normal adjustment is 10, the distance between the objective and eyepiece in cm is

An astronomical telscope has an eyepiece of focal-length 5 cm. If the angular magnification in normal adjustment is 10, the distance between the objective and eyepiece in cm is

The lens of a simple magnifier has a focal length of n2.5 cm. Calculate the angular magnification produced when the image is at the least distance of distinct vision.

In an astronomical telescope, focal length of eye piece is 5 cm and focal length of objective is 75 cm . The final image is formed at the least distance of distinct vision (=25 cm) from the eye. What is the magnifying power of the telescope ?

An astronomical telescope has an objective lens of focal length 20 m and eyepiece of focal length 1 cm. Find the angular magnification of the telescope.

An astronomical telescope has focal lengths 100cm & 10cm of objective and eyepiece lens respectively. When final image is formed at least distance of distinct vision, magnification power of telescope will be: