For the Screw dislocation they are parallel, and for the Mixed dislocation each section of the line makes a different angle with the Burgers vector which has a constant magnitude and direction.

A vector can be represented by a line segment ... Vectors are equal if they have the same magnitude and direction regardless of where they are. Triangle ABC is isosceles. X is the midpoint of ...

A vector can be represented by a line segment ... Vectors are equal if they have the same magnitude and direction regardless of where they are. Triangle ABC is isosceles. X is the midpoint of ...

A streamline is a line that is tangential to the instantaneous velocity direction (velocity is a vector, and it has a magnitude and a direction). To visualize this in a flow, we could imagine the ...