The focal length of the objective an astoomical telescope is 75 cm and that of the eye-piece is 5 cm.If the final image is ofrmed at the least distance of ditinct vision from the eye,calculate the magnifying power of the telescope.

A compound microscope has a magnification of 30. The focal length of its eye-piece is 5 cm. Assuming the final image to be formed at least distance of distinct vision (25 cm),calculate the magnification produced by the objective.

Define magnification of an astronomical refracting type telescope and find an expression for it when the final image is formed at least distance of distinct vision.

What is the magnifying power of an astronomical telescope when the final image of a distant object is formed at least distance of distinct vision?

In a compound microscope,an object is placed at a distance of 1.5 cm from the objective of focal length 1.25 cm .If hthe eye-piece has a focal length of 5 cm and the final image is formed at the near point,estimate the magnifying power of the icroscope.

A compound microscope consists of an objective lens of focal length 2.0 cm and an eyepiece of focal length 6.25 cm separated by a distance of 15 cm. How far from the objective should an object be placed in order to obtain the final image at the least distance of distinct vision (25 cm)? What is the magnifying power of the microscope in?

The focal length of the objective and eye piece of a telescope are respectively 200 cm and 5 cm.the maximum magnifying power of the telescope will be