The magnification of a telescope is the ratio of the angle subtended at the eye by the virtual image of the object to that subtended by the object.

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
• Generally, the deflection angle is measured twice, once with the telescope normal and once with the telescope reversed.
• While viewing through a level telescope and moving the eye slightly, a relative movement occurs between the image of the levelling staff and the cross hairs. The instrument is
• In modern telescope internal focusing telescope is used.
• The ratio of the focal length of the objective to that of an eye-piece of a telescope is called its
• The real image of an object formed by the objective must lie at the centre of telescope.
• The degree of the curve is the angle subtended by a chord of
• In internal focusing telescope brilliancy of image reduces due to extra internal lens.
• If the definition of a telescope is poor, it will produce a clear and district image.
• The capacity of telescope of producing a sharp image is called its