Surveying
The parallax of a point on the photograph is due to

All listed here
Ground elevation
Length of air base
Flying height

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Surveying
Sidereal day

Is divided into the conventional hours, minutes and seconds
Is slightly shorter than an ordinary solar day
All listed here
Is the period of time taken by the earth in making a complete rotation with reference to stars

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Surveying
If altitude bubble is provided both on index frame as well as on telescope of a theodolite, then the instrument is levelled with reference toi) altitude bubble on index frameii) altitude bubble on index frame if it is to be used as a leveliii) altitude bubble on telescopeiv) altitude bubble on telescope if it is to be used as a levelThe correct answer is

only (i)
both (i) and (iv)
both (ii) and (iii)
only (iii)

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