In an internal focussing type of telescope, the lens provided is

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• 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 internal focusing telescope brilliancy of image reduces due to extra internal lens.
• In modern telescope internal focusing telescope is used.
• When the anallatic lens is provided in the telescope of a tacheometer, the additive constant is zero.
• Generally, the deflection angle is measured twice, once with the telescope normal and once with the telescope reversed.
• In surveyor’s telescope, the convex lens nearest to the object is called ______________
• Removal of parallax, may be achieved by focussing
• In an internal focusing telescope
• 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