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Anallactic lens provided in the tacheometer is a
- a)Convex lens
- b)Concave lens
- c)plane convex lens
- d)plane lens
Correct answer is option 'A'. Can you explain this answer?
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Anallactic lens provided in the tacheometer is aa)Convex lensb)Concav...
It is a special convex lens, fitted in between the object glass and eyepiece, at a fixed distance from the object glass, inside the telescope of a tacheometer. The function of the anallactic lens is to reduce the stadia constant to zero. Thus, when tacheometer is fitted with anallactic lens, the distance measured between instrument station and staff position (for line of sight perpendicular to the staff intercept) becomes directly proportional to the staff intercept. Anallactic lens is provided in external focusing type telescopes only.
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Anallactic lens provided in the tacheometer is aa)Convex lensb)Concav...
Anallactic lens in tacheometer:
- Anallactic lens is a type of lens provided in tacheometers used in surveying.
- Tacheometer is a surveying instrument used for measuring horizontal and vertical angles, distances and elevations.
- Anallactic lens is a convex lens provided in the tacheometer.
- It is used to eliminate the error caused by the curvature of the earth's surface while measuring vertical angles.
- It helps to make the line of sight of the telescope parallel to the horizontal plane.
- Anallactic lens is placed in front of the object lens of the telescope and it is movable.
- It can be adjusted to different angles to compensate for the curvature of the earth's surface.
- The convex shape of the lens helps to bend the light rays towards the optical axis of the telescope, thus reducing the distortion caused by the curvature of the earth's surface.
- Anallactic lens is an important component of tacheometers used in surveying, as it helps to improve the accuracy of measurements.
- Anallactic lens is a type of lens provided in tacheometers used in surveying.
- Tacheometer is a surveying instrument used for measuring horizontal and vertical angles, distances and elevations.
- Anallactic lens is a convex lens provided in the tacheometer.
- It is used to eliminate the error caused by the curvature of the earth's surface while measuring vertical angles.
- It helps to make the line of sight of the telescope parallel to the horizontal plane.
- Anallactic lens is placed in front of the object lens of the telescope and it is movable.
- It can be adjusted to different angles to compensate for the curvature of the earth's surface.
- The convex shape of the lens helps to bend the light rays towards the optical axis of the telescope, thus reducing the distortion caused by the curvature of the earth's surface.
- Anallactic lens is an important component of tacheometers used in surveying, as it helps to improve the accuracy of measurements.
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Anallactic lens provided in the tacheometer is aa)Convex lensb)Concave lensc)plane convex lensd)plane lensCorrect answer is option 'A'. Can you explain this answer?
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