If the staff is held normal to the line of sight and the angle of elevation and depression are kept same, the the horizontal distance between instrument station and staff station computed by observation will be

- 1
  
  Same in both cases
- 2
  
  greater at an angle if elevation than at an angle of depression
- 3
  
  greater at an angle of depression than at an angle of elevation
- 4
  
  unpredictable

Display Comments

Leave a comment

Login at first then you can submit comment. Click here to login.