Explanation: Parallax is a state where there is an apparent movement of point viewed first with one eye and then viewed with another eye. If the difference in distance between the points sighted is measured then it can yield the difference in parallax.

Explanation: Stereo pair involves stereoscopic fusion, where the objects which are visualized from left eye and right eye are combined for generating output. Stereo pair can be viewed by using stereoscope and anaglyph.

Explanation: Depth perception involves determining the relative distance between the objects from the observer. It involves certain clues which are required for photogrammetry. Those are head parallax, convergence, accommodation, retinal display.

Explanation: Stereo pairs can be interpreted by using stereoscope, which is designed for assisting and magnifying perception of depth. Stereoscope has been classified as mirror stereoscope and lens stereoscope.

Explanation: The parallax equation for the ground co-ordinates of the point taken into consideration can be given as X = B*x / p. Here, B is the point considered, p is the parallax and x is the numerical value.

Explanation: The lens of stereoscope is having a greater importance in terms of visualizing an object. Two magnifying lens were used which makes it sight the object in accurate manner. The distance between nodal point and plane of photograph depends on the focal length of the lens.

Explanation: Parallax in case of stereoscopic view can be given as the displacement of point in the image due to successive exposures. In order to minimize the parallax, difference in parallax is calculated. It is the successive difference in the points taken into consideration.

Explanation: The overlapping parallax indicated by symbol p can be determined by the difference of x-coordinate of the point measured on the left hand photograph to the x-coordinate of the point on right hand photograph.

P = 22.

Explanation: The conditions for aerial stereoscopic view include photographs with sufficient overlapping, elevation of the camera for exposure and vertical camera axis. These are meant to be ideal conditions.