Question

Is the parallax angle directly proportional to the parallax?

Answer 1

Parallax Method : A distant body in space is observed from two different places on earth. The two lines of observations from two points on earth subtend an angle at the distant body. Knowing the angle and the distance between the two points on earth we can find the distance of the object in space. This is the parallax method of measurement.


or

Parallax Method:

When any object is seen from two different positions then there is a change in the position of the object with respect to the background . This phenomenon is named as Parallax. Here distance between two positions is called the basis.


for example


When we hold a pencil in front of us against the background of a wall and look at the pencil first by our left eye A (closing the right eye) and then by our right eye B (closing the left eye), we find that position of pencil changes with respect to the background wall . This is called as Parallax.
Here AB = basis and angle AOB is called parallax angle.
So from the figure angle AOB = b/x where AB=b and AO=BO=x



1. Parallax : The apparent displacement of any object as seen from two different points that are not in a line with the object.

Parallax angle: The angle between the two points of observation of an object that are not in a line with the object.