CBSE BOARD X, asked by dial30, 10 months ago

what are the different corrections in levelling(only for generous)

Answers

Answered by poonianaresh78p3767p

0

Explanation:

1. Instrumental error and Correction

Collimation error. Correction: Check before use and equalise sights.

Under sensitive bubble.

Errors in staff graduation. Correction: Check.

Loose tripod head.

Telescope not parallel to bubble tube. Correction: Permanent adjustment.

Telescope not at right angles to the vertical axis.

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