In modern telescope internal focusing telescope is used.

Related MCQs

• In internal focusing telescope brilliancy of image reduces due to extra internal lens.
• 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 an internal focusing telescope
• Generally, the deflection angle is measured twice, once with the telescope normal and once with the telescope reversed.
• In an internal focussing type of telescope, the lens provided is
• The temporary adjustments of a prismatic compass are i) Centering ii) Levelling iii) Focusing the prism The correct order is
• The process of turning the telescope about the vertical axis in horizontal plane is known as
• A telescope is said to be inverted if its
• The cross hairs in the surveying telescope are placed
• 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