The ratio of the focal length of the objective to that of an eye-piece of a telescope is called its

Related MCQs

• If altitude bubble is provided both on index frame as well as on telescope of a theodolite, then the instrument is levelled with reference to i) altitude bubble on index frame ii) altitude bubble on index frame if it is to be used as a level iii) altitude bubble on telescope iv) altitude bubble on telescope if it is to be used as a level The correct answer is
• In modern telescope internal focusing telescope is used.
• Generally, the deflection angle is measured twice, once with the telescope normal and once with the telescope reversed.
• The real image of an object formed by the objective must lie at the centre of telescope.
• If f1 and f2 are the distances from the optical center of a convex lens of focal length f to conjugate two points P1 and P2 respectively, the following relationship holds good
• In which telescope length is comparatively less?
• When a staff is sighted through the telescope, a certain length of staff is intercepted by the stadia lines. The staff intercept varies with the distance at which the staff is held.
• The power of a telescope to form distinguishable images of objects separated by small angular distance is called its
• The process of turning the telescope of a theodolite over its supporting axis through 180? in a vertical plane, is called
• The capacity of telescope of producing a sharp image is called its