error due to horizontal axis not being perpendicular to the vertical axis
index error i.e. error due to imperfect adjustrnent of the vertical circle vernier
error due to non-parallelism of the- axis of telescope level and line of collimation
none of the above
Discuss in Comment
"Scientists dream about doing great things. Engineers do them."
PSC Advertisement ⏩ | Federal PSC | Bagmati PSC | PSC Karnali | PSC Lumbini | PSC Sudurpaschim | PSC Gandaki | PSC State 1.