The index glass in an optical square is

Related MCQs

• The angle of intersection of the horizon glass and index glass in an optical square is
• The horizon glass in an optical square is
• 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
• An imaginary line joining the point of intersection of the cross-hairs of the diaphragm and the optical centre of the object glass, is known as
• A line joining the optical centre of the object glass and the centre of the eye piece, is known as
• The angle of intersection of the two plane mirrors of an optical square is
• The optical square is used to measure angles by
• An optical square is used for the same purpose as the cross-staff, but it is more accurate.
• In an optical square, the angle between the first incident ray and the last reflected ray is
• When the object lies on the left hand side of the chain line, then while taking offset with an optical square, it is held in