Question No : 22
The latitude of a place was obtained by subtracting the declination of a star from its zenith distance, the observed star was between
Question No : 23
The relation between the air base (B), photographic base (b), flying height (H) and the focal length (f) of a vertical photograph, is
Question No : 24
Spring tides are caused when
Question No : 25
The latitude of the observer's position, is
Question No : 26
The nautical mile is the length of
Question No : 27
Polaris is usually observed for the determination of the latitude when it is
Question No : 28
Rotation of the camera at exposure about horizontal axis normal to the line of flight, is known as